Evening Business Attire for Women By Meka Jones Women who work in the world of business know how important it is to look professional at the office or at networking events.
Hepatitis A vaccine is a vaccine against the hepatitis A virus. The first successful vaccine against it was invented by Maurice Hilleman at Merck. The vaccine protects against the virus in more than 95% of cases and provides protection from the virus for at least fifteen years.There are two types of vaccines: one type contains inactivated hepatitis A virus, the other contains a live but attenuated virus.he vaccine protects against the virus in more than 95% of cases and provides protection from the virus for at least fifteen years. There are two types of vaccines: one type contains inactivated hepatitis A virus, the other contains a live but attenuated virus.
Smallpox was most likely the first disease people tried to prevent by inoculating themselves and was the first disease for which a vaccine was produced. The smallpox vaccine was discovered in 1796 by the British physician Edward Jenner, although at least six people had used the same principles years earlier.ouis Pasteur furthered the concept through his work in microbiology. The immunization was called vaccination because it was derived from a virus affecting cows (Latin: vaccaâcow). Smallpox was a contagious and deadly disease, causing the deaths of 20â60% of infected adults and over 80% of infected children.