TWIN FALLS, Idaho (KLIX)-St. Luke's Health System announced it will begin scheduling booster shots of the Pfizer-BioNTech COVID-19 vaccines for teens ages 12 to 15 starting Monday evening. St. Luke's said it is making the boosters available per the Center for Disease Control's recent recommendations. The shots will also be available to those moderately or severely immunocompromised 5 to 11-year-olds. St. Luke's will open up scheduling at 7 p.m. (Jan. 7) on its MyChart site. Parents and guardians can also schedule an appointment for their child by calling 208-381-9500.

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RANKED: Here are the most popular national parks

To determine the most popular national parks in the United States, Stacker compiled data from the National Park Service on the number of recreational visits each site had in 2020. Keep reading to discover the 50 most popular national parks in the United States, in reverse order from #50 to #1. And be sure to check with individuals parks before you visit to find out about ongoing, pandemic-related safety precautions at www.nps.gov/coronavirus.