Detailed text transcripts for TV channel - MSNBC - 20210523:12:54:00
>> what do you make of the effectiveness numbers for pfizer biontech and astrazeneca? they're pretty good. the zack numbers are in the 60% versus the india and uk variants. do we need new vaccines? this will be upon us soon enough. >> no question and what's happening is the vaccine manufacturers really all of them but especially pfizer and moderna are working on new variations of the vaccine and ones that will continue to be effective against whatever variants are out there. there's a lot of work left to be done. this is not a static situation developing the vaccine once and say we're done. we...