Teton Wilderness, Wyoming. Part of one of the largest contiguous wild areas in the United States, Teton Wilderness bridges the area between Grand Teton National Park and the especially remote southeast corner of Yellowstone, and is bordered by two other federal wilderness areas within Bridger-Teton National Forest.
Four doses of polio vaccine (IPV) are routinely recommended for U.S. children at ages 2 months, 4 months, 6-18 months, and 4-6 years. The first dose may be given as early as age 6 weeks.
In 2000, the U.S. switched to the inactivated polio vaccine (IPV). Using an inactive (dead) form of the virus that cannot cause polio, the IPV is given as a shot in the arm or leg. Who Needs the Polio Vaccine. Most people should get the polio vaccine when they are children. Children should be vaccinated with four doses of IPV at the following ages: