If you have concern for your fellow man, you will

If you have concern for your fellow man, you will get vaccinated and boosted. These vaccinations need a boost which is nothing new. Hepatitis is a 3 shot vaccination process. With a booster, you will build your defense mechanism, especially in the lungs where these viruses cause the most damage for all the known strains. If you don't get vaccinated, you'll get sick, and allow the virus to mutate.