because of the fear of a global backlash or even a ban that might affect their economy? >> i am concerned. already today on social media, one of the scientists involved in identifying the sequences was making pleas for the restarting of flights because they can't get the materials they need to conduct further tests because there are bans on flights to south africa. that's a terrible sign. you know, one of the things we really do need to do with the evidence we have around the virus is to start doing the genetic -- or genomic surveillance we need to do domestically to see if we have cases and to lift these travel bans sooner than later because whatever effect they have is going to be quite modest. we shouldn't punish these countries further. >> this is a question that a family member of mine had, also a member of my team here in the studio had as well about boosters, right?