but, you know, they're in close proximity with a buchlk nch of others. or in restaurants, tables are six feet apart. but again, they are indoors and unmasked. especially, if we learn that variants are more transmissible. >> right. such a good point that you are making there, that everyone should really heed. before i let you go, this issue of the one dose, versus the two doses. and now, it seems that u.s. -- u.s. officials, perhaps, are doing something completely different from what the uk. the uk is saying, look. even though the british-medical association has said they think it's unfair, that they are going to try and give as many people as possible one dose. it seems, perhaps, the cdc won't be recommending that. i mean, what do you think? do you think it can be the one dose? that, that might be sound, medical advice, at this point? >> well, there has been discussion with the oxford-astrazeneca that it could be efficacious if given more time between the first and second doses. but we don't have data to support that in pfizer or moderna. in fact, pfizer