[link to www.globenewswire.com (secure)]

Content from the above:

....Traveling longer than 8 hours, whether by plane, car, bus or train, can increase risks for life-threatening blood clots. Being seated for long periods can slow blood flow, and high altitudes can activate the body’s blood-clotting system. Consider wearing compression socks or finding time to stretch or walk around when traveling to aid in proper blood flow....

So perhaps when combined with the Vax well then...let's just call this the canary in the coal mine.