A third booster dose may be necessary to mitigate neutralizing antibody fading after inoculation with two doses of an inactivated SARS-CoV-2 vaccine.

Neutralizing antibodies in volunteers who received two doses of an inactivated SARS-CoV-2 vaccine deceased over several months. A three-dose procedure study suggested that the boost conferred by a third dose rescued the waning of neutralizing antibodies after the two doses of the inactivated vaccine. Importantly, a booster dose can also elicit a more robust neutralizing antibody response than the two-dose procedure. This article is protected by copyright. All rights reserved.