So we're flying back from Ecuador to Toronto with a layover in El Salvador - SAL (50 minutes) on Avianca. With where we're going in Ecuador we don't need the vaccination. However, I'm getting very conflicting information whether we need it transiting SAL. My understanding seems to be that we don't need the vaccine for transit, but if we miss our connection we wouldn't be able to enter El Salvador. However, I've seen some reports that we'd need it just to transit. Does anyone have any knowledge on this?