I think that question is still being analyzed in terms of a response, but right now with the variants that are circulating globally, even if there's a reduced response to the vaccine, we do expect that the current vaccines will stimulate coverage for most of the variants that are circulating. On the question of boosters, people have come up with certain opinions or perspectives, but I actually don't think we know the answer and we must monitor both the virus and the duration of the vaccine immunity, which is being done at the moment on an ongoing basis.
On May 21st, 2021. See this statement in context.