over 1,000 covid-related deaths a day. that toll is up over 50% in just a week. vaccines, there were just three days in a row with more than a million shots in arms. we haven't seen that since mid-june. >> because especially with the delta variant, getting that protection is more important than ever. >> reporter: mississippi has among the lowest vaccination rates in the country. officials there say more and more people are taking a livestock anti-parasitic instead. there's an online lie that it fights covid-19. the fda tweeted, you are not a horse, you are not a cow, seriously, y'all, stop it. now, with this full approval, pfizer can also now market and advertise their vaccine. and today a company spokesperson told cnn that they hope to use that to increase confidence in this vaccine. one word of caution from the fda