and who do they call they call their physician friend and say how do i gain the system. reporter: meantime, international pressure has been growing on the u.s. not to widely distribute booster shots while much of the world still waits for first doses. during a virtual covid summit today, president biden announced the u.s. will buy half a billion pfizer vaccines and donate them to low-income countries calling the pandemic an all hands on deck global situation. i m proud that we ve gone from two million americans being fully vaccinated when i first took office on january 20th to 182 million and counting today in america but we also know that to beat the pandemic here we need to beat it everywhere. stephanie, we also got news today that maybe we have hit the peak of this current surge. yeah, lester this is good news nbc news data showing that we may have hit the peak last week, that seven out of the last eight days cases have dropped. that s the longest sustained decline that we