They (russians) are conducting large scale phase 3 experiment, with up to 40k volunteers. Need to watch closely; most of the volunteers are in Moscow, and it will be difficult to conceal high rate of side effects .
Careful, because a "high rate" would be ~1/100k.
Even a two SAEs in that cohort size, would be a huge deal and enough to shut down most efforts.
Edit: also note that the Russian Gamaleya vaccine is actually 2 vaccines one with a human adeno virus carrier and the other with a (chimp?) Ad5 and Ad26. So you could have a response to either one of them, or both. The problem with using a human viral carrier is that pre-exposed might fight it off without developing nCoV immunity.
