Search results
Results from the WOW.Com Content Network
Coronavirus diseases are caused by viruses in the coronavirus subfamily, a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, the group of viruses cause respiratory tract infections that can range from mild to lethal.
Human-to-human transmission of SARS‑CoV‑2 was confirmed on 20 January 2020 during the COVID-19 pandemic. [ 16 ] [ 39 ] [ 40 ] [ 41 ] Transmission was initially assumed to occur primarily via respiratory droplets from coughs and sneezes within a range of about 1.8 metres (6 ft).
SARS-CoV-2, the causative agent of COVID-19, was first introduced to humans through zoonosis (transmission of a pathogen to a human from an animal), and a zoonotic spillover event is the origin of SARS-CoV-2 that is considered most plausible by the scientific community.
The most recent COVID-19 vaccine should offer protection against the XEC variant, Russo says. “The most recent version of the vaccine seems to be reasonably well-matched,” he says.
Symptoms of COVID-19. Some less common symptoms of COVID-19 can be relatively non-specific; however the most common symptoms are fever, dry cough, and loss of taste and smell. [1] [22] Among those who develop symptoms, approximately one in five may become more seriously ill and have difficulty in breathing.
Alphacoronavirus chicagoense [1] ( also called Human coronavirus 229E and abbreviated HCoV-229E) is a species of coronavirus which infects humans and bats. [2] It is an enveloped , positive-sense , single-stranded RNA virus which enters its host cell by binding to the APN receptor . [ 3 ]
Human coronavirus OC43 [1] (HCoV-OC43) is a member of the species Betacoronavirus 1, which infects humans and cattle. [ 2 ] [ 3 ] The infecting coronavirus is an enveloped , positive-sense , single-stranded RNA virus that enters its host cell by binding to the N-acetyl-9-O-acetylneuraminic acid receptor . [ 4 ]
As the new coronavirus spreads, doctors are seeing a pattern emerge in the way people are responding to the disease. People at first will experience mild symptoms like a light cough or headache.