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.
Oral poliovirus vaccine (OPV) contains live attenuated poliovirus (Sabin strain types 1, 2 and 3) and is intended for polio prophylaxis in infants 6-12 weeks of age, all unimmunized children up to 18 years of age, and high-risk adults. Adults, however, should receive the inactivated poliovirus vaccine (IPV).