Print Email. A sinkhole, also known as a sink-hole, sink, swallow hole, shakehole, swallet or doline, is a natural depression or hole in the Earth's surface which may have various causes. Some are caused by karst processesâfor example, the chemical dissolution of carbonate rocks or suffosion processes in sandstone.
MMR vaccine is recommended routinely for all children at age 12 through 15 months, with a second dose at age 4 through 6 years. The second dose of MMR can be given as early as 4 weeks (28 days) after the first dose and be counted as a valid dose if both doses were given after the child's first birthday.easles vaccine, given as MMR, may be effective if given within the first 3 days (72 hours) after exposure to measles. Immune globulin may be effective for as long as 6 days after exposure.
When you go to donate blood, you will be asked if you have had any recent vaccinations. If you have, you might have to postpone your blood donation. For some live or attenuated (weakened) viral or bacterial vaccines (measles, mumps, oral polio, oral typhoid, yellow fever), you have to wait at least two weeks before donating your blood. For rubella or varicella zoster vaccines, you have to wait four weeks.