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.he initial dose of the vaccine should be followed up by a booster six to twelve months later. Protection against hepatitis A begins approximately two to four weeks after the initial vaccination. Protection is proven to last at least 15 years and is estimated to last at least 25 years if the full course is administered.
The Channels--sandstone boulders on the Brumley Gap Trail in Washington County, Virginia. Find this Pin and more on Take a Hike! by bethoskinner. The Channels--sandstone boulders on the Brumley Gap Trail in Washington County, Virginia. See More
Sponsored Topics. Meadow Bridge is a town in Fayette County, West Virginia, United States. The population was 321 at the 2000 census. Historically, the town was also known as Beelick Knob, a coal mining operation. Meadow Bridge is located at 37Â°51â²45â³N 80Â°51â²19â³W / 37.8625Â°N 80.85528Â°W / 37.8625; -80.85528 (37.862399, -80.855169).