Let’s take a look at Corona Start, Symptoms, Isolation Period, Aftereffects, and Runs. Corona Virus infection-Covid-19 is an infectious disease caused by the SARS-COV-2 virus, which was first discovered in Wuhan, China in December 2019, and had a great influence around the world. Viruses are primarily spread through the respiratory discharge of infected people, and can cause various symptoms and serious complications after infection. This virus, which continues to evolve through the variation, is still threatening public health by repeating recurrence in 2025.
Corona start
Corona Virus infection-Covid-19 is an infectious disease caused by the SARS-COV-2 virus found in Wuhan, China, at the end of 2019. The new corona virus was reported to cause unknown pneumonia initially, and on December 31, 2019, China officially informed the World Health Organization (WHO). The virus is mainly spread through the respiratory secretions of the infected person, and on January 20, 2020, WHO confirmed that it is possible to spread between people. In the early days, it was called ‘2019-NCOV’, and on February 11, 2020, WHO officially granted the name ‘Covid-19’.
The origin of Corona 19
- Wuhan angry market relevanceAccording to the early epidemiological survey, many of the 19 cases of Corona in December 2019 were related to the angry seafood market in Wuhan, China. In particular, two of the first three cases were directly related to the market of wildlife in the market. About 28%of the cases reported in December 2019 were directly related to the market, and the initial cases were mainly concentrated near the angry market. This has been an important basis for identifying the occurrence of the virus.
- Animal prayer potentialScientists believe that corona viruses were originally spread from animals to humans. Studies show that the viral positive reactions were concentrated in samples collected from the southwest of the angry market, where animals such as raccoon poison were sold. These evidence supports the possibility that the virus has occurred through natural animal-human propagation paths rather than leakage of laboratory.
Initial spreading process
- Spread in China: It is estimated that the first human infection case occurred in Wuhan around November 17, 2019. In the early days, it was considered unknown pneumonia, but on January 7, 2020, Chinese public health authorities identified a new type of corona virus as a cause of the cause of onset. The rapidly spreading virus in Wuhan also spread to other areas in China.
- International spread: On January 13, 2020, the first confirmed by China was reported in Thailand, and on January 20, a man in his 30s showed symptoms after his trip to Washington, and was confirmed as the first confirmed person in the United States. By January 30, Corona 19 has spread to 20 countries, including China. In Europe, the first case was confirmed in France on January 28 in Germany on January 24.
WHO’s response
- Public health emergency declarationOn January 30, 2020, WHO proclaimed the 19th on the Corona as the ‘International Public Health Emergency (PHEIC)’ and issued a warning to all countries. This was a measure that recognized the seriousness of the virus and the risk of international proliferation. WHO recommended measures to monitor infections, early discovery, isolation, and tracking contacts.
- Fan Demick DeclarationOn March 11, 2020, WHO officially declared Corona 19 as a ‘Pan Demick’. At this point, the virus has already spread to several continents around the world, and each country has begun to implement various defense policies such as blockade, social distance, and wearing masks. On March 13, the United States proclaimed a state emergency, and on March 19, the US State Department announced the recommendation of travel to the world.
The beginning of Corona 19 was recorded as one of the most serious public health crises in human history. The fan Demick lasted for about three years until the WHO declared the end of the international public health emergency on May 5, 2023. During this period, the world responded to Corona 19 through vaccine development, research on therapeutic agents, and establishing a protective system.
Corona symptoms/isolation period
Covid-19 is a respiratory disease caused by SARS-COV-2 virus, which has affected worldwide as of 2025. Corona 19 is spread through the respiratory secretion of the infected person, and the symptoms may vary depending on the virus variation. The US Centers for Disease Control and Prevention (CDC) has updated Corona 19 symptoms and isolation guidelines as of March 2025, depending on the vaccination state and virus variation. In order to check the corona 19 infection, it can be checked through a rapid antigen or PCR test.
The main symptoms of Corona 19
- Fever or chills: One of the most common symptoms of corona infections, and the body temperature rises more than 38 ° C. In particular, in the case of 2025, the virus virus has increased with night sweating. Fever usually occurs at the beginning of infection, and may vary in duration depending on the individual.
- Cough and sore throat: Continuous dry cough and neck pain is a typical symptom of Corona 19. In the 2025 new variations, especially with runny nose and sneezing. These symptoms are similar to regular colds, but if you appear with other corona 19 symptoms, it is recommended to take a test.
- Difficulty breathing: Symptoms that are breathtaking or difficult to breathe, which is a warning signal that can indicate a serious state. If your breathing difficult or with chest pain is accompanied, you should immediately get medical help. It can be more serious in people with elderly or underlying diseases.
- Loss of taste or smell: Corona 19 Infections may occur that do not feel the taste or smell. This symptom is less common in other respiratory diseases, so it is a characteristic symptom that can suspect Corona 19. Some patients can last for several weeks or months.
Corona 19 isolation guidelines
- Isolation period for positive determination: According to the CDC guidelines in 2025, if you have been diagnosed with Corona 19 positive, you must be isolated for at least 5 days, regardless of symptoms or vaccination status. The starting date of isolation (0 days) is the day when the symptoms begin or if they are asymptomatic. If the symptoms are mild, the symptoms can be improved after 5 days and can be terminated if there is no heat for 24 hours without antipyretic.
- End of symptomsIf you have minor symptoms, you can improve your symptoms after 5 days and terminate isolation without heat for 24 hours without antipyretic. However, if you have moderate or serious symptoms such as shortness of breath or breathing difficulties, you should be quarantined for at least 10 days and consult with a medical professional before ending isolation. It is recommended to wear a mask by the 10th day after the termination of isolation.
Corona 19 Inspection Recommendation
- Expression of symptomsIf you have symptoms such as fever, cough, sore throat, fatigue or taste/smell loss, you should be inspected immediately. When symptoms appear, it is important to minimize contact with others and to be tested as soon as possible. Rapid antigen tests can be used conveniently at home and can be found within 15-30 minutes.
- After exposure: If you have contact with the Corona 19 confirmed person, it is recommended to be inspected between 3-5 days after exposure, even if there is no symptoms. This is to discover early asymptomatic infections and prevent further propagation. If you are exposed, you should wear masks in public places for 10 days and avoid contact with high -risk groups.
Corona 19 continues to change in 2025, and it is important to follow the latest guidelines. If you have symptoms, you will be inspected immediately and take appropriate isolation measures when you are positive. In particular, it is recommended to check the infection through the test before contacting the elderly or those with weak immunity.
Corona sequelae
Corona sequelae (long covid) is a symptom that lasts for more than 12 weeks after the Corona 19 infection and cannot be diagnosed with other diseases. According to the World Health Organization (WHO), about 6%of the corona 19 infected people suffer from sequelae. According to domestic and foreign studies, 10-30%of the Corona 19 -confirmed person experienced sequelae, and some studies have reported up to 80%. Corona sequelae can last for a long time even after being cure, which has a serious impact on the quality and productivity of patients.
Main symptoms
- Extreme fatigue: The most common symptoms of patients with corona sequelae are experienced by about 58%of patients. The energy is exhausted enough to be difficult to carry out everyday activities, and even after light activities, recovery is slow. This fatigue has a feature that is not completely resolved by rest.
- Difficulty breathing and chest pain: Many patients complain of breathing or feeling of pressure. This may be because Corona 19 has damaged lung tissues or affected heart function. According to the autopsy results, many resy cells were found in the heart of Corona 19 deaths, which is associated with thrombosis.
- Cognitive dysfunction (Brain Fog): A symptom of about 27%of patients experience, as if it was foggy in the head, it is a state in which the concentration is reduced. Memory decrease, loss of thinking, and concentration disorders occur, which causes great difficulties in daily life and work. The autopsy showed a wide range of brain damage in Corona 19 patients.
- Taste and smell abnormal: One of the characteristic symptoms of Corona 19, it can last for a long time after infection. Some patients do not feel completely taste or odor, or experience distorted taste and odor. This is assumed that the virus affects the olfactory nerves.
Causes and risk factors
- Excessive reactionThe exact cause of the corona sequelae has not yet been completely known, but it is generally estimated that the immune system in the body responds excessively due to Corona 19 infections, which attacks other organs as well as viruses. This can lead to inflammation in various organs and long -term damage. Thrombusion formation and microvascular damage are also cited as the main cause.
- High riskAccording to the British National Statistical Office (ONS), corona sequelae are more common in age groups, women, underlying disease holders, health, social welfare, and educational workers, and residents of poor areas. It is also reported that patients with severe symptoms during early infections are more likely to suffer aftermath.
Diagnosis and treatment
- Diagnostic criteria: The clear diagnostic criteria for the corona sequelae have not yet been established. The British health authorities last more than 12 weeks after the corona infection and define symptoms that cannot be diagnosed with other diseases as corona sequelae. Diagnosis is mainly based on patients’ symptoms and troops, and tests are performed to exclude other diseases.
- Treatment approach: There is no specific treatment for corona sequelae, and symptoms that focus on relieving symptoms are mainly performed. The World Health Organization (WHO) is developing clinical medical guidelines for the management of sequelae, and medical providers provide patients with self -management guidelines or rehabilitation services as needed. Some studies show that vaccination can lower the risk of corona sequelae.
Corona sequelae should be recognized as a serious medical state, not just ‘lower health’ or ‘drug side effects’. In 2025, many patients have not found meaningful recovery, and more research and support are needed. As Corona 19 is still extensively circulating, it is important to raise awareness of sequelae and to develop appropriate treatment along with the prevention of infections.
Corona reunion
Corona 19 is a phenomenon of infectious diseases caused by the emergence of new variations of the SARS-COV-2 virus and increased immune avoidance ability. As of March 2025, a new corona virus called ‘HKU5-COV-2’ is found in Wuhan, China, and attention is required worldwide. In the United States, XEC variations account for 37%, and then LP.8.1 (31%) and KP.3.1.1 (9%) are popular. Experts warn that the next fands could come around 2025, considering the infectious disease.
Recent Corona 19 variations
- XEC variation: Currently, the most advanced variation in the United States, accounting for 37%of all infections. This variation has evolved in the previous Omikron series, showing a more enhanced propagation force. In particular, there is a risk of re -infection of people who have previously been infected or vaccinated because of improved immune avoidance.
- New discovery virus (HKU5-COV-2): A new corona virus found in bats at the Wuhan Virus Institute in China in February 2025. This virus has the ability to penetrate human cells in a similar way to SARS-COV-2, which causes Covid-19, and is concerned with experts. Human infections have not been reported yet, but there is a possibility of being transmitted from animals to humans.
2025 Corona 19 Recovery Prospect
- Fan: “The next infectious disease can occur in 2025 by the trendy cycles of SARS (acute respiratory syndrome), swine flu, and MERS (Middle East Respiratory Syndrome) since 2003.” This is a result of analyzing the pattern of infectious diseases in the past, and is expected to be likely to spread to respiratory infectious diseases. However, there is an opinion that Corona 19 fan Demi is longer and may come later than expected.
- Seasonal factorsAs of January 2025, the US CDC data is rising, according to US CDC data, which is related to seasonal factors. Low temperature dry winter environment is advantageous for virus survival and increases indoor activity. Therefore, it is predicted that Corona 19 reinforcement is high in the fall and winter season of 2025.
Countermeasure
- Strengthening vaccination strategy: 2024-2025 Seasonal Corona 19 vaccinations will be used to use new vaccines that are more effective in the current popular variation (JN.1, etc.). In particular, high -risk groups such as senior citizens aged 65 or older, immunoes, hospitalization and entrance to infectious vulnerable facilities are available for free vaccinations, and are being prepared to allow concurrent vaccination with influenza in October. The vaccine is planned to prevent severe and death, and inoculation is recommended around high -risk groups.
- Construction of medical response systems: We are strengthening the constant medical response system by maintaining the foundation for medical response to infectious diseases such as the use of negative pressure beds. In particular, additional measures are being prepared, such as securing preemptive medical capabilities so that they can respond stably even in more than 300,000 people a day. In addition, we are building an active patient treatment system by activating fast tracks for high -risk rapid medical treatment and expanding therapeutic prescription agencies.
Corona 19 recurrence remains a continuous threat in 2025, and is expected to spread infection according to the emergence of new stools and seasonal factors. Therefore, various response is required, such as compliance with personal defense rules, vaccinations of high -risk groups, and strengthening the medical system. In particular, it is important to strengthen international cooperation and surveillance system in preparation for potential threats such as the new corona virus found in China.
FAQ
Q: How did Corona 19 start?
A: Corona 19 was first discovered in December 2019 as an unknown pneumonia case associated with the angry seafood market in Wuhan, China. On January 7, 2020, Chinese authorities confirmed the cause of a new type of corona virus, and on January 13, Thailand was reported in Thailand. The WHO declared an international public health emergency on January 30, 2020, and officially declared a fan Demick on March 11.
Q: What is the main symptoms of Corona 19 and how long do you have to be isolated?
A: The main symptoms of Corona 19 include fever, dry cough, fatigue, sore throat, taste or smell loss, and shortness of breath. According to the CDC guidelines as of 2025, if the Corona 19 positive decision is received, it must be isolated for at least 5 days. Symptoms can be improved and can be terminated after 5 days if there is no heat for 24 hours without antipyretic, but it is recommended to wear a mask by the 10th day.
Q: What is the corona sequelae (long cobid) and what is the symptoms?
A: The corona sequelae lasts for more than 12 weeks after the Corona 19 infection, and about 10-30%of the infected people experience. The main symptoms include extreme fatigue (58%), dyspnea, chest pain, cognitive dysfunction (brain pot, 27%), taste and smell abnormalities. The causes of sequelae are estimated to be excessive reactions, thrombosis formation, microvascular damage, and more common in age groups, women, and underlying diseases.
Q: What is the CORONA 19 re -trend as of 2025?
A: As of March 2025, in the United States, XEC variations (37%), LP.8.1 (31%), and KP.3.1.1 (9%) are mainly popular, and in China, a new corona virus called ‘HKU5-COV-2’ is found. Experts warn that the next fands would come around 2025, considering the appearance of infectious diseases in the past, and is expected to have a high possibility of re-re-reassiveness in the fall and winter season.
Q: What measures do you need to prevent and respond to Corona 19?
A: The latest vaccination is important for the prevention of Corona 19, and high -risk groups, such as seniors aged 65 or older, and immunoes, must be inoculated first. Personal defense rules are recommended to wash their hands, wear masks in a closed space, and self -price when they are sick. In terms of medical systems, it is important to establish an active patient treatment system, such as securing sound pressure beds, activating fast tracks for high -risk rapid medical treatment, and expanding therapeutic prescription agencies.
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