In three years, COVID-19 is still unpredictable – different strains can be accompanied by different symptoms. The most characteristic are fever, headache, weakness, cough, loss of smell, but sometimes the disease is easily confused, for example, with a rotavirus infection or an intestinal disorder.

“Sometimes with an upper respiratory tract infection there is an indirect infection of the gastrointestinal tract. This may be accompanied by an immune response of the gastrointestinal tract. Rarely, but coronavirus can be seen in the form of an intestinal flow with nausea, diarrhea, and vomiting. This happens, but is extremely rare. Basically, the classic flu course “– quotes URA.RU virologist, candidate of medical sciences Pavel Volchkov.

He stressed that the coronavirus could also open the gate for other diseases. For example, bacterial pneumonia often develops against the background of COVID-19, in which there are high risks of death.

To date, as KP.RU recalls, the WHO list includes several strains that cause fear for life. It includes the Alpha strain, discovered in the UK in September 2020, which is characterized by high contagiousness and is resistant to the action of the immune system. Another – the Beta strain – was detected in the same year in South Africa: it is also quickly transmitted from person to person and is difficult to treat with drugs. The gamma strain, a Brazilian variant, was identified in early 2021 and is highly contagious, resistant to immune antibodies, and can cause disease in young adults and pregnant women. And in the summer of the same year, scientists identified the Indian variety of SARS-CoV-2. In addition to the fact that it spreads quickly, many have a very severe course. At the end of 2021, WHO supplemented this list with the Omicron strain, which is highly contagious and, in some cases, depending on the subspecies, a severe course of the disease.

from colds.