3 ms·
That's true some years, but not all. Usually, the difference is over 55 (or whatever) you get a quadrivalent vaccine instead of trivalent. That is, vaccine for
by bediger4000 9mo ago
That's true some years, but not all. Usually, the difference is over 55 (or whatever) you get a quadrivalent vaccine instead of trivalent. That is, vaccine for the usual strains, plus a 4th. It's not totally different.