The Advisory Committee on Immunization Practices (ACIP) recommends a two-dose vaccine schedule for measles, mumps, rubella and varicella vaccines for children, with the first dose at age 12-15 months and the second at age 4-6 years.accines and Immunizations. ShareCompartir. For the first dose of measles, mumps, rubella, and varicella vaccines at age 12-47 months, either MMR vaccine and varicella vaccine or MMRV vaccine may be used.
grackle. 1  any of several long-tailed American birds of the family Icteridae, especially of the genus Quiscalus, having usually iridescent black plumage. 2  any of several Old World birds of the family Sturnidae, especially certain mynas.
Cool Facts. 1  Those raggedy figures out in cornfields may be called scare-crows, but grackles are the #1 threat to corn. 2  Common Grackles are resourceful foragers. 3  Grackles have a hard keel on the inside of the upper mandible that they use for sawing open acorns. Typically they score the outside of the narrow end, then bite the acorn open. You might see a Common Grackle hunched over on the ground, wings spread, letting ants crawl over its body and feathers.