vaccinated. so it's also in those who are under five. air ways are a bit smaller. and the virus does replicate really quickly in the air ways. so the kids can't toll rat as much air way inflammation as adults can. >> we know new york new mayor is considering a booster mandate. for city employees. do you think that this is what's now required considering we are as you say, two years into this pandemic. >> absolutely. it's a great idea. the right public health move. anybody who is going indoors to vaccines aren't really giving any efficacy in prempbting you from getting omicron. if you are six months out. you have 0 to 20% efficacy in having in getting it. and transferring it. there's still a good efficacy against you getting really sick. but if we're trying to tamp down the amount of spread requiring