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.
Below are three graphs. The first shows the number of polio cases in the United States, adults and children, from 1937 to 2013. The second graph shows the number of deaths caused by the polio virus in adults and children from 1950 to 2013. And the third graph shows the polio vaccination rates among children aged 19 to 36 months in the United States from 1980 to 2014. As of Aug. 18, 2014, the CDC recommends that children receive the first dose of the polio (IPV) vaccination at 2 months of age. Microscopic view of the polio virus