He simply means that giving more vaccine shots in “rich” nations will make those shots unavailable for “poor” nations. He wants the rich nations to GIVE the vaccines to the poor nations.
Prolong the pandemic? Nope… herd immunity will arrive one way or another. What prolongs the pandemic are shutdowns and quarantining the healthy.
Exactly. The shut downs and restrictions have only prolong this pandemic. If we had been like Florida, as an example, and basically remained open the entire time it aloud Covid spread amongst the healthy population who is that little risk of getting sick or die and giving them immunity to it while protecting the most at risk.