KNTV NBC Nightly News With Lester Holt August 11, 2021 01:37:00
As pfizer and moderna conduct their own safety trials, texas officials confirming some people are intentionally getting more doses than they should experts say that decision is premature. >> i don't believe that most people should be going out and doing this on their own. it's going to cause a lot more confusion and we don't -- we want to actually look at the safety and efficacy data of third shots before we make guidance about who would benefit from it and who won't. >> morgan, what do we know about the safety of getting a booster shot at this time? >> reporter: lester, the safety of the shot...