Grinding your teeth is usually done at night when you are asleep and not aware of the damage you are inflicting on your teeth. If you are waking up to sore or sensitive teeth, jaw muscles, or joints, you may be grinding your teeth at night.
Polio. Before Jonas Salk began testing a polio vaccine in 1952, an average of between 13,000 and 20,000 polio cases of paralytic poliomyelitis were reported yearly (In fact in 1952, the number of polio cases nationally peaked at 58,000).lthough the broad use of the oral live virus Sabin vaccine resulted in rare but serious cases of vaccine-induced paralytic polio until the late 1990s, new guidelines call for administering four doses of the inactivated Salk vaccine from 2 months to 4 to 6 years, eliminating the risk of vaccine-related polio. Measles.
A Look at Each Vaccine: Polio Vaccine. The inactivated polio vaccine (or IPV) is now the only vaccine given in the United States to prevent polio. IPV is given as a series of four shots at 2 months, 4 months, 6 to 18 months, and again at 4 to 6 years of age.aralysis caused by polio occurs when the virus replicates in and attacks the nervous system. Two polio vaccines have been available since 1955. The inactivated polio vaccine (IPV) was available first, given as a shot in 1955. A more convenient form, given as liquid drops via the mouth, was developed in 1961.