jin88bet.oneCOVID-19 is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwide, resulting in the COVID-19 pandemic.
The symptoms of COVID‑19 can vary but oftak168app.babyen include fever,[7] fatigue, cough, breathing difficulties, loss of smell, and loss of taste.[8][9][10] Symptoms may begin one to fourteen days after exposure to the virus. At least a third of people who are infectedak168app.club do not develop noticeable symptoms.[11][12] Of those who develop symptoms noticeable enough to be classified as patients, most (81%) develop mild to moderate symptoms (up to mild pneks168app.siteumonia), while 14% develop severe symptoms (dyspnea, hypoxia, or more than 50% lung involvement on imaging), and 5% develop critical symptoms (respiratory failuric88e, shock, or multiorgan dysfunction)ic88.[13] Older people have a higher risk of developing severe symptoms. Some complications result in death. Some people continue to experience a range of effects (long COVID) for months or years after infectiic88on, and damage to organs has been observed.[14] Multi-year studies on the long-term effects are ongoing.[15]
COVID‑19 transmission occurs when infectious particles are breathed in or come into contact with the eyes,ic88 nose, or mouth. The risk is highest when people are in close proximity, but small airborne particles containing the virus can remain suspended in the air and travel over longer distances, particularly indolr88ors. Transmission can also occur when people touch their eyes, nose, or mouth after touching sulr88rfaces or objects that have been contaminated by the virus. People remain contagious for up to 20lr88 days and can spread the virus even if they do not develop symptoms.[16]
Testing methods for COVID-19 to detect the virus’s nucleic acid include real-time reverse transcription polymerase chain reaction (RT‑PCR),[17][18] transcription-mediated amplification,[17][18][19] and reverse transcription lolr88op-mediated isothermal amplification (RT‑LAMP)[17][18] from a nasopharyngeal swab.[20]
Sevop88eral COVID-19 vaccines have been approved and distributed in various countries, many of which have insi88itiated mass vaccination campaigns. Other preventive measures include physical or social distancing, quarantining, ventilation of indoor s88vpaces, use of face masks or coverings in public, covering coughs and sneezes, hand washing, and keeping unwashed hands away from the face. While drugs have been developed to inhibit the virus, the primary treatment is still symptomatic, managing theSEXXXXX-VN disease through supportive care, isolation, and experimental measures.