Pediatric patients with prior COVID-19 or MIS-C are not protected against Omicron

Research drawing on the national Overcoming COVID-19 study, led by Boston Children’s Hospital, and the hospital’s own Taking On COVID-19 Together Group provides evidence that children who previously had COVID-19 (or the inflammatory condition MIS-C) are not protected against the newer Omicron variant.

Vaccination, however, does afford protection, the study found. The findings, published in Nature Communications on May 27, parallel similar findings in adults.

“I hear parents say, “Oh, my kid had COVID last year,” says Adrienne Randolph, MD, MSc, of Boston Children’s Hospital, who launched Overcoming COVID-19 in 2020. Randolph was senior author on the current paper with Surender Khurana, PhD, of the Food and Drug Administration’s Division of Viral Products, Center for Biologics Evaluation and Research. “But we found that antibodies produced by prior infections in children don’t neutralize Omicron, meaning that unvaccinated children remain susceptible to Omicron.”

The researchers obtained blood samples from 62 children and adolescents hospitalized with severe COVID-19, 65 children and adolescents hospitalized with MIS-C, and 50 outpatients who had recovered from mild COVID-19. All the samples were taken during 2020 and early 2021, before the emergence of the Omicron variant.

In the laboratory, they exposed the samples to a pseudovirus (derived from SARS-CoV-2, but stripped of its virulence), and measured how well antibodies in the samples were able to neutralize five different SARS-CoV-2 variants of concern: Alpha, Beta, Gamma, Delta, and Omicron.

Overall, children and adolescents showed some loss of antibody cross-neutralization against all five variants, but the loss was most pronounced for Omicron.

Omicron is very different from previous variants, with many mutations on the spike protein, and this work confirms that it is able to evade the antibody response. Unvaccinated children remain susceptible.”

Adrienne Randolph, MD, MSc, Boston Children’s Hospital

In contrast, children who had received two doses of COVID-19 vaccine showed higher neutralizing antibody titers against the five variants, including Omicron.

Randolph hopes these data will encourage parents to have their children and teens vaccinated. According to data from the CDC, only 28 percent of 5- to 11-year-olds and just 58 percent of 12- to 17-year-olds had received two vaccine doses as of May 18, 2022, numbers that have barely changed since March. An FDA panel will meet on June 15 to consider authorization of COVID-19 vaccines for children under age 5.

Source:

Boston Children’s Hospital

Journal reference:

Tang, J., et al. (2022) Cross-reactive immunity against the SARS-CoV-2 Omicron variant is low in pediatric patients with prior COVID-19 or MIS-C. Nature Communications. doi.org/10.1038/s41467-022-30649-1.

Baby News

Related Posts

Using lab-grown stomachs to shed light on the symptoms of COVID-19

Comments Off on Using lab-grown stomachs to shed light on the symptoms of COVID-19

Patriotic Porridge (Cream of Wheat)

Comments Off on Patriotic Porridge (Cream of Wheat)

Effective anti-vaping advertisements can have the greatest impact on teens

Comments Off on Effective anti-vaping advertisements can have the greatest impact on teens

Few-foods diet leads to a significant decrease in ADHD symptoms

Comments Off on Few-foods diet leads to a significant decrease in ADHD symptoms

Lemon Chicken Orzo Soup – Super Healthy Kids

Comments Off on Lemon Chicken Orzo Soup – Super Healthy Kids

Insight into Neurological Diagnosis in Children

Comments Off on Insight into Neurological Diagnosis in Children

Homemade Cream of Chicken Soup

Comments Off on Homemade Cream of Chicken Soup

Intervention to help parents prevent obesity in firstborn children benefits siblings

Comments Off on Intervention to help parents prevent obesity in firstborn children benefits siblings

How to limit added sugars in your child’s diet – CHOC

Comments Off on How to limit added sugars in your child’s diet – CHOC

Back-to-school health tips during the COVID-19 pandemic

Comments Off on Back-to-school health tips during the COVID-19 pandemic

The Mount Sinai Hospital completes full renovation of its children’s ED

Comments Off on The Mount Sinai Hospital completes full renovation of its children’s ED

Researchers developing an online tool kit to prevent childhood obesity

Comments Off on Researchers developing an online tool kit to prevent childhood obesity

Create Account



Log In Your Account