covid variants

Coronavirus variants continue to spread in Connecticut and across the country, and on Thursday the state released the latest data.

Pfizer and Biontech announced Thursday that their vaccine has proven effective against the coronavirus for at least six months after the second dose, including the South African variant.

Public health officials are tracking multiple variants of COVID-19 in Connecticut.

An expert in the field of infectious diseases talked with NBC Connecticut about the COVID-19 variants that are infecting people and why the vaccines will protect against them.