On Jul. 19, 2022, the NIH announced that although COVID-19 booster vaccinations in adults elicit high levels of neutralizing antibodies against the Omicron variant of SARS-CoV-2, antibody levels decrease substantially within 3 months, according to new clinical trial data.

The findings, published in Cell Reports Medicine, were from a study sponsored by the National Institute of Allergy and Infectious Diseases (NIAID). In the new analysis, investigators report that nearly all vaccine combinations evaluated (see table) elicited high levels of neutralizing antibodies to the Omicron BA.1 sub-lineage. However, antibody levels against Omicron were low in the group that received Ad26.COV2.S as both a primary vaccine and boost.