Why is there no mutated virus in the US, where the epidemic is most severe?

[hualushui]

The US has the largest number of deaths and the largest number of infections, but there is no mutated virus. So strange

 

[powastick]

The US has the largest number of deaths and the largest number of infections, but there is no mutated virus. So strange

Variants of SARS-CoV-2 - Wikipedia

en.wikipedia.org

Lineage B.1.429 / CAL.20C
Iota: Lineage B.1.526

 

[Oldman1]

The US has the largest number of deaths and the largest number of infections, but there is no mutated virus. So strange

Iota variant,[1] also known as lineage B.1.526, is one of the variants of SARS-CoV-2, the virus that causes COVID-19. It was first detected in New York City in November 2020. The variant has appeared with two notable mutations: the E484K spike mutation, which may help the virus evade antibodies, and the S477N mutation, which may help the virus bind more tightly to human cells.

By February 2021, it had spread rapidly in the New York region and accounted for about one in four viral sequences.[2][3] As of April 11, 2021, the variant has been detected in at least 48 U.S. states and 18 countries.[4][5]

Under the simplified naming scheme proposed by the World Health Organization, B.1.526 has been labeled iota variant, and is considered a variant of interest (VOI), but not yet a variant of concern.[6]

 

[hyperman]

most of the deaths were from early on last year, when the US was completely unprepared. Things became more under control as infrastructure scaled up and manufacturing started meeting demands. One of the reasons as to why the variants are lower is the high rate of vaccinations and localized targeting of hotspots. The Pfizer vaccine has been incredibly effective in terms of efficacy against the different variants.