To prevent measles, children (and some adults) should be vaccinated with the measles, mumps, and rubella (MMR) vaccine. Two doses of this vaccine are needed for complete protection.Children should be given the first dose of MMR vaccine at 12 to 15 months of age.The second dose can be given 4 weeks later, but is usually given before the start of kindergarten at 4 to 6 years of age.o prevent measles, children (and some adults) should be vaccinated with the measles, mumps, and rubella (MMR) vaccine. Two doses of this vaccine are needed for complete protection.
GPS (Global Positioning System) Satellites orbit the earth and transmit signals. GPS receivers take the signal information and use it to calculate the userâs exact geographic location. Most mobile phones and smartphones have GPS receivers. Camcorders and digital cameras also use them for GPS tagging.resent to your audience. 1  Invited audience members will follow you as you navigate and present. 2  People invited to a presentation do not need a Prezi account. 3  This link expires 10 minutes after you close the presentation.
The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense.GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use.ere are some other interesting facts about the GPS satellites (also called NAVSTAR, the official U.S. Department of Defense name for GPS): 1  The first GPS satellite was launched in 1978. 2  A full constellation of 24 satellites was achieved in 1994. 3  Each satellite is built to last about 10 years.