Mr. Chair, the vaccines we have, the two that are authorized, are the Moderna and the Pfizer, which have very strong efficacy against the Wuhan strain, the original strain. If they have an alteration in their efficacy as a result of variants and they lose some of their efficacy by 10% or 20%, or even a bit more, they still will be very useful tools and vaccines that you would want to deploy widely in your population.
On February 19th, 2021. See this statement in context.