Not many in this country had the opportunity to receive the AZ vaccine. Almost all got the Sinovac jab. Now I've read that there are some doses of the Chinese Sinopharm vaccine in circulation here. This fact might renew some concern as I have read that the Sinopharm may be more problematic than Sinovac with respect to basic prevention efficacy and the potential for complicating side effects in some people who receive it. I'll be watching for more current info on Sinopharm as we move forward and especially if more of this vaccine is received and administered here. I still have not heard of any significant problems stemming from the use of Sinovac in this country...yet, as people continue to line up to get their 2nd dose.