joining us is bloomberg opinion columnist faye flam. the vaccine production is expanding, and there are new variants rapidly spreading, some of them the earlier ones, some of them perhaps, we don't know for sure, but some of them resistant to the amenity people build up, or to the vaccine, what do we have to watch right now to feel confident that we are getting a handle on this pandemic? faye: we need to get more the vaccine out there. the good news is, the vaccines work at of the people anticipated. they seem to work really well. one question i was wanting to answer in my last column was, what do we know about whether the vaccines are actually going to stop people from getting asymptomatic or silent cases, and passing on the disease? and the news is pretty good, that they probably do help. and that is really important for not having the virus more chances to get new you take should, and not letting new mutant versions spread as far as they would without these vaccines. caroline: faye, your forecast is all about the science of this, and