U.S. airlines are encouraging the TSA to begin conducting temperature checks as part of its passenger screening process.

“Temperature checks are one of several public health measures recommended by the CDC amid the Covid-19 pandemic and will add an extra layer of protection for passengers as well as airline and airport employees,” the trade group Airlines for America said in a statement over the weekend.

“Temperature checks also will provide additional public confidence that is critical to relaunching air travel and our nation’s economy.”

A4A’s passenger airline members include American, Delta, Southwest, United, Alaska, JetBlue and Hawaiian.

The call came two days after Frontier announced that on June 1 it will implement temperature checks prior to boarding for all passengers and temperature checks at the start of work shifts for employees. Customers whose temperature reads 100.4 degrees or higher won’t be allowed to board their flight. If time allows, Frontier will do two temperature checks for passengers, with a break in between them, before refusing boarding.

A4A said TSA would be a more proper entity than individual airlines to undertake temperature checks.

“As all screening processes for the traveling public are the responsibility of the U.S. government, having temperature checks performed by the TSA will ensure that procedures are standardized, providing consistency across airports so that travelers can plan appropriately,” the organization said.