I would say that these remain open questions. As public health professionals, we are looking carefully at the science and trying to understand what the impact of variants will be. We need more data from countries that are doing research in this area. Those data are starting to come to us, and we're analyzing those carefully. That's the way, of course, that we consistently provide our advice, based on those data. At this point we're waiting for more data on the—
On February 19th, 2021. See this statement in context.