Mutation strains of the new coronavirus. In May 2021, the WHO began to name new coronavirus strains with Greek letters. So far, 11 mutant strains have been named
including Alpha, Beta, Delta, etc.
First, the United States, Japan, and some countries in Europe and Latin America have reported cases of infection with the "Mu" mutant strain.
Second, the South African National Institute of Communicable Diseases has stated that it is paying close attention to the new mutant strain of the new coronavirus named "C.1.2".
The third type, on August 31, 2021, the World Health Organization reported that it was monitoring a new coronavirus mutant strain B.1.621 called "Mu" because this strain has anti- The risk of vaccine resistance requires further study and observation, so this strain is listed as a "variant to be observed."
The fourth type is the AY.4.2 strain.
The fifth strain, B.1.640 strain.
The sixth type is the Delta mutant strain (AY.4 evolutionary branch) Warsaw strain.
The seventh type is the new variant of the Omicron strain, the BA.2 subtype strain. There are several other variants of Omicron.