Children born during the COVID-19 pandemic are getting fewer vaccines compared to children born in the 2010s. To control infectious diseases in the US population, the Centers for Disease Control and Prevention (CDC) recommends that all kids get a set of vaccines known as the “combined 7-series” vaccines, by the time they turn 2. Though trends for the individual vaccines in the series vary, complete vaccination is trending downward: 72.8% of children born in 2020 and 2021 got the full set of seven by 35 months, compared to 74.4% of children born in 2013–2014.What’s included in the combined 7-series vaccines?The series includes vaccines to protect against: Chickenpox (varicella): 1 or more doses Diphtheria, lockjaw (tetanus), and whooping cough (pertussis): 4 or more doses, commonly of the DTaP vaccine Hepatitis B: three or more doses Hib infections: three to four or more doses, depending on the vaccine Measles: one or more doses, commonly of the MMR vaccine Pneumococcal diseases: four or more doses, commonly of the PCV vaccine Polio: three or more doses