therefore you can go out but you must wear a mask and the reason for wearing a mask is that it is possible that if you didn't wear a mask, you could transmit it. that's the reason for wearing a mask. >> i think it makes some people nervous to be around people who could be carriers, even in a mask especially given the chance -- transmissibility of omicron. many are depending on the antigen tests. you can get a lot of false positives or false negatives from those. what is your advice when it comes to testing? >> well, if you are exposed and feel that you really want to make sure that you are tested in the sense of knowing definitively whether you're infected, a pcr is the most sensitive and accurate test.