The CDC and its Advisory Committee on Immunization Practices (ACIP) now recommend that all adolescents aged 11-18 get vaccinated against meningococcal disease. That's not a radical change from the CDC's old meningitis vaccination schedule. In the past, vaccination of adolescents and young adults was recommended to coincide with specific ages or events, the CDC's Tom Clark, MD, said at a news conference today.
Cool Facts. 1  American Crows congregate in large numbers in winter to sleep in communal roosts. 2  Young American Crows do not breed until they are at least two years old, and most do not breed until they are four or more. 3  In some areas, the American Crow has a double life.
Mating pairs establish territories of their own. Males will sometimes mate with more than one female in a season. Mating season for arctic hares is in the spring, usually during April and May. After a gestation period of around 50 days, the young hares, called leverets, are born in the late spring or early summer.When they are born, leverets have their eyes open and are already covered in hair. There are usually 2 to 8 leverets in the litter, with the average being about 5 or 6.ating pairs establish territories of their own. Males will sometimes mate with more than one female in a season. Mating season for arctic hares is in the spring, usually during April and May. After a gestation period of around 50 days, the young hares, called leverets, are born in the late spring or early summer.