Flublok is highly purified and does not contain influenza virus, antibiotics, formaldehyde, preservatives, egg protein, latex, gluten or gelatin unlike other flu vaccines. Flublok Quadrivalent was FDA approved in 2016 for adults 18 and older.

What ingredients are in the Flublok vaccine?

A single 0.5 mL dose of Flublok contains sodium chloride (4.4 mg), monobasic sodium phosphate (0.195 mcg), dibasic sodium phosphate (1.3 mg), and polysorbate 20 (Tween®20) (27.5 mcg).

Is Flublok safer?

Flublok® is an incredibly pure, safe, and effective influenza vaccine option that offers the recipient numerous benefits: Triple strength. No influenza virus.