SEATTLE, WA – JUNE 21: Deni Valenzuela, 2 (C), sits on the lap of her mother, Xihuitl Mendoza (R), as she receives her first dose of the Pfizer Covid-19 vaccination from nurse Deborah Sampson (L) at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A vial of the Pfizer Covid-19 vaccine, labeled for ages two to five during research but still acceptable for children below age two, is seen at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Nora Burlingame, 3, sits on the lap of her mother, Dina Burlingame, and gets a high five from nurse Luann Majeed after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Covid-19 vaccinations for children younger than 5 began today across the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A 20-month-old baby receives its first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A nurse holds a syringe that contains a dose of the Pfizer Covid-19 vaccine for children under age five at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Doses of the Pfizer Covid-19 vaccine and vaccination record cards await patients at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Signs direct patients to the pediatric Covid-19 vaccine clinic at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive a Covid-19 vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A vial of the Pfizer Covid-19 vaccine, labeled for ages two to five during research but still acceptable for children below age two, is seen at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A vial of the Pfizer Covid-19 vaccine, labeled for ages two to five during research but still acceptable for children below age two, is seen at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A 20-month-old baby receives its first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Doses of the Pfizer Covid-19 vaccine and vaccination record cards await pediatric patients at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Xihuitl Mendoza holds her daughter, Deni Valenzuela, 2, after Deni received her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A two-year-old wears a bandage after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: A nurse works inside the pediatric Covid-19 vaccine clinic at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive a Covid-19 vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Nurse Deborah Sampson prepares a dose of the Pfizer Covid-19 vaccine at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Nurse Deborah Sampson (L) prepares to administer the Pfizer Covid-19 vaccine to Deni Valenzuela, 2, (R) at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Today marks the first day that children younger than five can receive the vaccine in the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Deni Valenzuela, 2, sits on the lap of her mother, Xihuitl Mendoza, and gets a kiss from her father, Francisco Valenzuela, after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Covid-19 vaccinations for children younger than 5 began today across the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Deni Valenzuela, 2, sits on the lap of her mother, Xihuitl Mendoza, next to her father, Francisco Valenzuela, after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Covid-19 vaccinations for children younger than 5 began today across the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Nora Burlingame, 3, sits on the lap of her mother, Dina Burlingame, and gets a fist bump from nurse Luann Majeed after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Covid-19 vaccinations for children younger than 5 began today across the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Nora Burlingame, 3, sitting on the lap of her mother, Dina Burlingame, inspects her bandage after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Covid-19 vaccinations for children younger than 5 began today across the U.S. (Photo by David Ryder/Getty Images)SEATTLE, WA – JUNE 21: Nora Burlingame, 3, sits on the lap of her mother, Dina Burlingame, and gets a sticker from nurse Luann Majeed after receiving her first dose of the Pfizer Covid-19 vaccination at UW Medical Center – Roosevelt on June 21, 2022 in Seattle, Washington. Covid-19 vaccinations for children younger than 5 began today across the U.S. (Photo by David Ryder/Getty Images)
