...and because many governments recognize this and incentivize people to vaccinate
-
-
This Tweet is unavailable.
-
Yep, it's largely explicable due to change in diagnosis http://journals.cambridge.org/action/displayAbstract;jsessionid=85AB1FBA3D7CB44A26AC1F36AD58A22F.journals?aid=9495906&fileId=S003329171400172X …
End of conversation
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.