Number of Childhood and Adolescent Vaccinations Administered Before and After the COVID-19 Outbreak in Colorado

Abstract

This study assesses the association of social distancing due to coronavirus disease 2019 (COVID-19) with immunizations administered by age category (0-2 years, 3-9 years, and 10-17 years) in Colorado.

Figure 1.. Interrupted Time Series Analysis for Total Vaccine Doses Administered, January 5 Through May 2, 2020, by Age Group

For birth to 15 months, reflected in this report as 0- to 2-year-olds, the immunization schedule recommends 4 doses of diphtheria, pertussis, and tetanus vaccine; 3 doses of inactivated polio vaccine; 2 to 3 doses of rotavirus vaccine; 3 doses of hepatitis B vaccine; 3 to 4 doses of Haemophilus influenzae type b vaccine; 4 doses of 13-valent pneumococcal conjugate vaccine; 1 dose of measles, mumps, rubella vaccine; 1 dose of varicella vaccine; 2 doses of hepatitis A vaccine; and 1 to 2 doses of annual influenza vaccine. Children aged 3 to 9 years are recommended to receive 1 dose of diphtheria, pertussis, and tetanus vaccine; 1 dose of inactivated polio vaccine; 1 dose of measles, mumps, rubella vaccine; 1 dose of varicella vaccine (at 4-6 years of age); and 1 to 2 doses of annual influenza vaccine. Children and adolescents aged 10 to 17 years are recommended to receive 1 dose of tetanus, diphtheria, and pertussis vaccine; 2 doses of quadrivalent meningococcal conjugate vaccine; 2 to 3 doses of human papillomavirus vaccine; and 1 dose of annual influenza vaccine.

Figure 2.. Interrupted Time Series Analysis for Specific Vaccine Doses Administered, January 5 Through May 2, 2020, for Individuals Aged 0 to 2 Years