Good reasons for caution

Two covid vaccines share a common thread that might account for blood clotting in rare cases.

Note: I am not a doctor and am not advising anyone on a particular course of action. This piece is intended to inform the general reader.

Arrows point to small purple dots on micrcoscopic exam. These are platelets.

The common thread between the Oxford-AstraZeneca covid vaccine and a similar vaccine from Johnson and Johnson, is the way that instructions for making virus spike…