This is a second question on vaccines to cover the variants. My understanding is that Moderna and Johnson & Johnson are already working on tweaking their vaccines. It seems fairly easy with both of those technologies. There are minor changes on the spike protein and you change the vaccine a bit.
Are you going to require that the vaccine producers with these new tweaks go through the usual process of phase one, phase two and phase three trials, or can that be expedited given that so far it seems like the vaccines are safe as they are?