 Valneva SE NASDAQ: VALN has responded to data published from the U.K COV-Boost COVID-19 vaccine trial that investigated the reactogenicity and immunogenicity of seven different COVID-19 vaccines at different dose levels in vaccinated individuals. All seven vaccines given in the COV-Boost study increased immunity when given as booster shots to people who had previously received two doses of AstraZeneca Plcs NASDAQ: AZN Vaxzevria. 