MSNBC Yasmin Vossoughian Reports September 4, 2021 22:25:00
Vaccines. how worried are you? >> right. so let me just kind of back up a minute and, you know, unpack this a little bit so as a quick reminder to everybody who's listening to us. so every virus mutates. some viruses mutate faster than others, but every virus mutates very fast for influenza, much more slowly for the coronavirus, the sars-cov-2. that said, it is always around the corner that we can have a mutation or a variant develop that could cause more problems, could be more transmissible, more infectious. it could have -- it could make people sicker than the previous variants. that's why ...