The building block of DNA is called the nucleotide, which is composed of a nitrogenous base (adenine, guanine, cytosine, or thymine), a five-carbon sugar (deoxyribose in DNA), â¦ and one to three phosphate groups. + 16 others found this useful.
Special cases of minimum ages and intervals. Two childhood vaccines require a bit more explanation regarding scheduling: â¢. MMR at age 1 year â Many statesâ school and childcare regulations specify that the minimum age for receipt of MMR vaccine be âon or after the first birthday,â with no allowance for a grace period.
All children should receive two doses of measles-containing vaccine after their first birthday, unless the vaccine is contraindicated. MMR vaccine should be administered for both doses. The first dose of MMR vaccine should be administered routinely at 12 to 15 months of age.Children who receive measles-containing vaccine before 12 months of age should receive additional doses of MMR when they are 12 to 15 months of age and at 4 to 6 years of age.MR vaccine should be administered for both doses. The first dose of MMR vaccine should be administered routinely at 12 to 15 months of age. Children who receive measles-containing vaccine before 12 months of age should receive additional doses of MMR when they are 12 to 15 months of age and at 4 to 6 years of age.