Immunized? There’s an app for that
If you’re of a certain age, or if you travel to exotic places, you’ll be familiar with the “yellow card.” Issued by the World Health Organization originally for use in yellow fever epidemics, this…
If you’re of a certain age, or if you travel to exotic places, you’ll be familiar with the “yellow card.” Issued by the World Health Organization originally for use in yellow fever epidemics, this…