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.
The first ever polio vaccine was developed by Dr. Jonas Salk at the University of Pittsburgh in the early 1950s. It was a killed vaccine that was tested in clinical trials in â¦ 1954 and ultimately gained government approval by 1955 for use on the general public.There is also another polio vaccine that was developed by Dr. Albert Sabin. This vaccine was a live version of the polio virus and is taken orally. It was approved for use in the general public in 1963.