President Trump on Friday tweeted his thanks to the “great men and women” at FedEx and UPS for delivering millions of doses of the Pfizer COVID-19 vaccine across the country — even during deadly snowstorms.

“THANK YOU to the GREAT men and women of @FedEx and @UPS for driving through the storms this week to deliver millions of doses of the vaccine across the country. Two Great American Companies!” Trump wrote.

Both companies were tapped by the administration to help with the complicated delivery of the drug — which is shipped in 50 pounds of dry ice to keep the vaccine stable at minus 70 degrees Celsius — as part of Operation Warp Speed.

The first doses of Pfizer’s miracle drug rolled out of the company’s Michigan plant Sunday after a lightning-fast authorization process and have begun being administered to front-line workers and other high-risk individuals around the country.

On Friday, Vice President Mike Pence became the first senior administration official to receive the shot in a move designed to assure the American people that the drug is safe.

“I didn’t feel a thing, well done,” Pence said afterward. “Make no mistake about it. It’s a medical miracle.”

The vaccine has been distributed in the same week that a powerful storm hit the East Coast, blanketing cities in as much as three feet of snow and causing hundreds of car accidents. Seven people are also suspected to have died in the storm.