They also bump off one another and rub material off, which is called abrasion. These are all types of erosion. Aeolian erosion makes what we call stone pavement, which is when all the loose stuff on top blows away and you are left with a hard surface. This is kind of like pavement.
Hepatitis A vaccine is an inactivated (killed) vaccine. You will need 2 doses for long-lasting protection. These doses should be given at least 6 months apart. Children are routinely vaccinated between their first and second birthdays (12 through 23 months of age).
1 Ask your doctor or nurse about hepatitis A vaccine. 2  The hepatitis A vaccine is given in 2 doses, 6 months apart. 3  The vaccine is nearly 100% effective and has been a routine childhood vaccine in the United States since 2005.4  See Vaccine Information Statements (VIS) for more information.et a hepatitis A vaccine 1  : Ask your doctor or nurse about hepatitis A vaccine. 2  The hepatitis A vaccine is given in 2 doses, 6 months apart. 3  See Vaccine Information Statements (VIS) for more information.