COVID-19 is a contagious disease caused by the coronavirus SARS-CoV-2. In January 2020, the disease spread worldwijin88bet.onede, resulting in the COVID-19 pandemic.
The symptoms of COVID‑19 can vary but often include fevak168app.babyer,[7] fatigue, cough, breathing difficulties, loss of smell, and loss of taste.[8][9][10] Symptoms may begin one toak168app.club fourteen days after exposure to the virus. At least a third of people who are infected 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 symptomsks168app.site (up to mild pneumonia), while 14% develop severe symptoms (dyspnea, hypoxia, or more than 50% lung involvement on imaging), and 5% develop critical symptoms (ric88espiratory failure, shock, or multiorgan dysfunction).[13] Older people have a higher risk of developing severe symptoms. Some complications result in death. Some peoplic88e continue to experience a range of effects (long COVID) for months or years after infection, and damage to organs has been observed.[14] Multi-year studies on the long-termic88 effects are ongoing.[15]
COVID‑19 transmission occurs when infectioic88us particles are breathed in or come into contact with the eyes, nose, or mouth. The risk is highest when people are in close proximity, but small ailr88rborne particles containing the virus can remain suspended in the air and travel over longer distances, particularly indoors. Transmission can also occur lr88when people touch their eyes, nose, or mouth after touching surfaces or objects that have been contaminated by the virus. People remain contagious for up to 20 days and can spread the virus even if they do not develop symptoms.[16]
Testing methods lr88for COVID-19 to detect the virus’s nucleic acid include real-time reverse transcription polymerase chain reaction (lr88RT‑PCR),[17][18] transcription-mediated amplification,[17][18][19] and reverse transcription loop-mediated isothermal amplification (RT‑LAMPop88)[17][18] from a nasopharyngeal swab.[20]
Several COVID-19 vaccines have been approved and distributed in various countries, many of which have initiated mass vaccination campaigns. Other preventive measures include physical or social distancing, quarasi88ntining, ventilation of indoor spaces, use of face masks88v 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 the disease through supportive care, isolation, and SEXXXXX-VNexperimental measures.