a mutation that potentially makes the virus more easily transmitted. the virus spreads. it can mutate in vaccinated and unvaccinated. we have to bring transmission down. i'll tell you quick, if you were treating your -- let's say you had an infection on your hand and you were treating with antibiotics, you would probably also wrap your hand and keep it clean. you wouldn't just take the antibiotics and continue to expose your hand to bacteria. it's the same thing here. we're not just going to vaccinate and shower ourselves with virus. we have to bring viral transmission down at the same time as we vaccinate. >> are they working on an