 እርሳቸውም ፣ "በመጨረሻ ፣ በቅርቡ ማን እንደ ተሻሻለ ወይም ምርመራ እንዳደረገ እና ማን ክትባት እንደወሰደ ለማሳየት አንዳንድ ዲጂታል ሰርቲፊኬቶች ይኖረናል" ብለዋል ።
Bill responded Gates: "At some point we will have some digital certificates that will show who has recovered, who has recently been tested, or once we have a vaccine, who has received it."