The United States has reported at least 2,463 cases of coronavirus variants that were first spotted in the United Kingdom, South Africa and Brazil, according to the US Centers for Disease Control and Prevention.
The CDC warned that these figures don't represent the total number of such cases circulating nationwide -- just those that have been detected by analyzing positive samples.
The UK variant: The vast majority of these cases, 2,400, are the more contagious variant known as B.1.1.7, which was originally detected in the UK. This variant has been found in 44 states, Puerto Rico and Washington, DC. About a quarter are in Florida.
South Africa variant: There are 53 cases of the B.1.351 variant, first seen in South Africa, reported in 15 states and Washington, DC.
Brazil variant: Lastly, 10 cases of the P.1 variant first linked to Brazil have been discovered in five US states.