What is the difference between the influenza vaccine for intramuscular administration and
the one for nasal spray administration
We know two kinds of influenza vaccine. First one consists of inactivated viruses(no live viruses) and couldn`t cause influenza. Inactivated vaccine is administering intramuscular. Another one is nasal vaccine, which administrating nasal and contains with weakened viruses. In this way, viruses don`t cause the disease in most cases but sometimes after vaccination patient with weak immune system might have influenza disease. Nasal vaccine is recommended only for healthy people in the age gap from 2 years to 49 and non-pregnancy people. Both of them are increasing level of special antibody against viruses in our organism. Every year vaccines against influenza virus contain several types of viruses. If serotypes are correct, vaccine will prevent influenza in 70-90% of healthy people.