#transmissibility

#transmissibility

H5N1 avian influenza could easily mutate to infect humans, raising pandemic concerns. Only one mutation needed for efficient human cell binding.

FLiRT is a new family of highly transmissible COVID variants spreading across the country.

New COVID-19 variants are causing a surge in cases in California despite fewer people getting vaccinated, but they are not making people sicker overall.

Los Angeles County is experiencing an increase in COVID cases and hospitalizations due to the spread of new FLiRT subvariants.