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.
The dose of zoster vaccine can be counted as the first of two doses of varicella vaccine for an adult who is not immune to varicella. The second dose of varicella vaccine should be given 4 to 8 weeks after the first dose.ccording to ACIP's General Recommendations on Immunization, an invalid dose of a live attenuated vaccine (such as zoster vaccine) should be repeated no less than 4 weeks after the invalid dose. This information is located at www.cdc.gov/mmwr/pdf/rr/rr6002.pdf, pages 1819.