De mest almindelige bivirkninger (som forekommer hos mere end 1 ud af 10 voksne, vaccinerede personer) som er set i kliniske undersøgelser, var problemer omkring injektionsstedet (såsom rødmen, blodudtræden, smerter eller ubehag, hævelse eller fremkomst af knudedannelse) og hovedpine.
The most common side effects (in more than 1 in 10 adults vaccinated) seen in a clinical trial were problems around the injection site (such as redness, bruising, pain or discomfort, swelling or appearance of a hard lump) and headache.