Unlike other flu vaccines , Flublok does n't rely on eggs or the influenza virus . Instead , it 's made by growing a virus protein in insect cells . This allows for more rapid production in the event of a pandemic , the FDA says . Comment:
Unlike other flu vaccines , Flublok does n't rely on eggs or the influenza virus . Instead , it 's made by growing a virus protein in insect cells . This allows for more rapid production in the event of a pandemic , the FDA says . The vaccine is available in limited supplies during the current flu season .