Thank you very much.
Dr. Quach-Thanh, in response 3 that you sent us today, you state the following:
At present, there is uncertainty as to the degree to which the vaccines prevent people from acquiring the infection...
Later, you add:
Until such data is available, modellers are not in a position to estimate the proportion of the population needed to vaccinate to reduce R below 1...or to compare between vaccines in their capacities to do so.
Can you explain to me how you plan to compile data on the vaccines administered so that, for example, you can compare their capacity to deal with variants?