BBCNEWS BBC News December 21, 2021 15:11:00
And then, of course, you have the issue that there is often a significant lag of weeks between first becoming unwell and then needing oxygen or ventilation, or even unfortunately succumbing to this disease. so the clinical data are taking time, and its because of the natural history of the infection. we have vaccination and some underlying immunity now, so those sorts of outcomes may even be extended further. therefore, the importance of laboratory and experimentation, i think, is more of an iss...
Source: archive.org