Tuesday, September 30, 2025

Coronavirus disease 2019

Must Read

Coronavirus disease 2019

COVID-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 often 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 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 symptoms (up to mild pneumonia), while 14% develop severe symptoms (dyspnea, hypoxia, or more than 50% lung involvement on imaging), and 5% develop critical symptoms (respiratory failure, shock, or multiorgan dysfunction).[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 infection, 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, 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 indoors. Transmission can also occur when 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 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 loop-mediated isothermal amplification (RT‑LAMP)[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, quarantining, ventilation of indoor spaces, 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 the disease through supportive care, isolation, and experimental measures.

spot_img
spot_img
Latest News

Казино Рио бет – лучшие слоты в 2025 году

Казино Рио бет - лучшие слоты в 2025 году

More Articles Like This

spot_img
Sabung Ayam Online sabung ayam online sv388 Sv388 judi bola judi bola judi bola judi bola

SV388 SV388 JUDI BOLA Live Casino Online Slot Gacor SBOBET88 SABUNG AYAM ONLINE JUDI BOLA ONLINE CASINO ONLINE MAHJONG WAYS 2 sabung ayam online judi bola Sore Hari Gunakan Tips Pola Bermain Coba Pola Spin Manual Zigzag Cuma 7x Putaran Spin Klik Manual Sore Hari Bikin Tukang Ojol Langsung Bayar Tagihan Motor Pola Manual Spiral Sederhana Bantu Tukang Ojol Gunakan Teknik Spin Manual Kombinasi Bikin Pegawai Lurah Judi Bola Sabung Ayam Online SLOT MAHJONG SABUNG AYAM ONLINE JUDI BOLA ONLINE Sabung Ayam Online JUDI BOLA Sabung Ayam Online JUDI BOLA SV388, WS168 & GA28 SBOBET88 SV388, WS168 & GA28 SBOBET88 SBOBET88 CASINO ONLINE SLOT GACOR SV388 MIX PARLAY Live Casino Online Slot Gacor SV388, WS168 & GA28 WS168 MIX PARLAY LIVE CASINO ONLINE SLOT GACOR