english: It's also why in the spring, we have to make a best guess at which three strains are going to prevail the next year, put those into a single vaccine and rush those into production for the fall.
non_english: Zaradi teh sprememb vsako pomlad ugibamo, kateri tip gripe bo prevladal v naslednji sezoni, da lahko ustvarimo cepivo in ga do jeseni proizvedemo v zadostnih količinah.