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
Northumberland County is a county located in the Commonwealth of Virginia. As of the 2010 census, the population was 12,330. Its county seat is Heathsville. The county is located on the Northern Neck and is part of the Northern Neck George Washington Birthplace AVA winemaking appellation.he area was occupied at the time of English settlement by the Algonquian-speaking historic tribes of the Wicocomico and Chickacoan. The county was created by the Virginia General Assembly in 1648 during a period of rapid population growth and geographic expansion.