(Geneva / Copenhagen Comprehensive) The World Health Organization said the day before yesterday that the pathogenicity of BA.2, the coronary virus, is not more serious than the BA.1 subtype.
BA.2 should continue to be classified as "must be concerned about crown disease strains"
Fan KehovSaid: "According to the samples of people from different countries, we did not find the difference in the severity of BA.1 and BA.2." She said: "In terms of hospitalization risks, the severity of these two subtypes is similar.This is a very important discovery, because BA.1 and BA.2 are spreading a lot in many countries. "
WHO issued a statement saying that BA.2 should continue to be classified as" must be concerned"Variantofconcern" should also continue to be classified as a subtype of the Omikon poison strain.
After dyeing BA.1, ba.2 is rare, but it may still be
BA.2 and BA.1 as many as 40 gene mutationsDifferences, including spiny protein and amino acids of some other proteins, are different.Preliminary studies have shown that BA.2 has a more growth advantage than BA.1, which may be the reason why BA.2 is more contagious than BA.1.Scientists are doing further research to understand why BA.2 has the advantage of growth.
Studies from the Danish National Serum Research Institute found that BA.1 people may still be infected with BA.2, but this situation is extremely rare.
The patients who are infected with BA.2 are mainly young people who have not vaccinated vaccines. They generally only have mild symptoms, and no one is admitted to the hospital or died.Scientists have detected less viruses in these patients, showing that these patients have had some immunity after BA.1 had previously infected BA.1.
BA.1 is the main Omikon subtype poison strain currently spread around the world, but more than 88 % of Danish infected with BA.2, BA.2 in Britain, South Africa, and NorwayThe disease is also increasing.
The Ministry of Crown Diseases of the WHO is exploring a research results of scientists from the University of Tokyo.Studies from Dongda found that after no hamster of the coronary virus immunity was infected with BA.1 and BA.2, the hamsters infected with BA.2 were heavier and the lung damage was more serious.
The WHO's crown disease technology department is also studying the severity data from South Africa, the United Kingdom and Denmark.The level of vaccination or infection with the population of these countries is very high, and the data shows that the severity of BA.2 and BA.1 is not different.
BA.2 is called the "invisible version" Omikon poisonous strain subtype, because it has a very strong concealment and it is difficult to detect.Pipkak, a virusist at the Empires of London, Britain, said earlier that given the severity of BA.1 and BA.2 is not significantly different, BA.2 should not affect the effectiveness of the vaccine.
