4 Logarithmic Functions Every function of the form f (x) = a x passes the Horizontal Line Test and therefore must have an inverse function. This inverse function is called the logarithmic function with base a. 5 Logarithmic Functions The equations y = log a x and x = a y are equivalent.
Measles, Mumps and Rubella (MMR) vaccine. Disadvantages to the MMR vaccine. A vaccine, like any medicine, is capable of causing serious problems, such as severe allergic reactions.The risk of MMR vaccine causing serious harm, or death, is extremely small.Mild problems include: Fever (up to 1 person out of 6) Mild rash (about 1 person out of 20) Swelling of glands in the cheeks or neck (rare) If these problems occur, it is usually within 7-12 days after the shot. Moderate problems include:he risk of MMR vaccine causing serious harm, or death, is extremely small. Mild problems include: Fever (up to 1 person out of 6) Mild rash (about 1 person out of 20) Swelling of glands in the cheeks or neck (rare) If these problems occur, it is usually within 7-12 days after the shot. Moderate problems include:
Top of Page. Measles can be prevented with the MMR (measles, mumps, and rubella) vaccine. One dose of MMR vaccine is about 93% effective at preventing measles if exposed to the virus, and two doses are about 97% effective.In the United States, widespread use of measles vaccine has led to a greater than 99% reduction in measles cases compared with the pre-vaccine era.ne dose of MMR vaccine is about 93% effective at preventing measles if exposed to the virus, and two doses are about 97% effective. In the United States, widespread use of measles vaccine has led to a greater than 99% reduction in measles cases compared with the pre-vaccine era.