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.
Prepared 2010; updated 2011. The number of young hatched and successfully raised by whooping crane pairs in the reintroduced population is below expectation with most pairs abandoning first nests after egg laying.everal pairs have nested in the same areas for 22 consecutive years. Wild whooping cranes may start laying eggs as early as three years of age although the average age of first egg production is usually five years old.