Vaccination is one of the most effective methods to strengthen the immune system (as if the opponents tried to prove the opposite).
the Flu each year reaping his victims.
Create a cure for cancer will be a huge breakthrough for mankind, but the disease is known, it is much better to prevent than to cure.
the Annual epidemic of the influenza virus able to bring down the health of a great number of people.
Mosquitoes remain the primary vector of malaria.