Those hepatitis shots I took turned out to be unnecessary since I never did travel to Algeria. Those cootie inoculations I got when I was 5 proved unnecessary as well.
No vaccinations are required to visit the Twogag Facebook page. Not that it's safe! There just isn't one.
Frank was giving Wayne a shot that would hopefully keep him from getting sick from whatever is in that spray can in the last panel. Wayne thought the shot was for an exotic vacation he had already prepared for.
Thanks for the explanation ^o^