Result: In addition, lower rate of
rhinitis was observed in
M4V infection as compared to 20AS and a higher hospitalisation rate was associated with
M4V infection as compared to
M1V.
Discussion: The severity is also different since the
M1V was less severe than other lineages, the N501YV appears to be less severe than the
M4V, which seems to have had the
Discussion: This underlines the fact that
COVID-19 presents a variability from July 2020, which is associated with epidemiological modifications such as the source (the
M1V undoubtedly came from Africa, the 20AS from China, the N501YV from England and the source of
M4V is unknown but is believed to be of European origin).
SARS_CoV_2 mutation literature information.
PMID: 
2021
Clinical microbiology and infection
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