"Contrary to the viral posts, medical experts say there is no
evidence that vaccinated travelers face an increased risk for blood
clots at high altitudes due to the COVID-19 vaccine.
“This sounds patently false. I would not have any concerns about vaccinated individuals traveling by air,” Dr. Adam Cuker, assistant professor of medicine at the University of Pennsylvania, told us in an email. Cuker’s research and clinical expertise is in blood clotting and bleeding disorders. “I am not aware of any evidence of an increased risk of thrombosis in [vaccinated] individuals with air travel.”