Army Spec. Dorien Lewis, a combat medic with Division Sustainment Troops Battalion MEDOPS, 3rd Division Sustainment Brigade, administers the Moderna COVID-19 vaccine to an Army soldier at Camp Arifjan, Kuwait, Aug. 17, 2021. Medics across Camp Arifjan held a COVID-19 vaccine drive for personnel that are not fully vaccinated (Photo by: Army Sgt. Marquis Hopkins). 

The secretaries are also directed to "impose ambitious timelines for implementation and to report regularly on vaccination completion using establishment systems for other mandatory vaccine reporting," the memo states. 

"The secretary has communicated to the military department to execute this mandatory vaccination program with, obviously, skill and professionalism, which we also do, but also with a measure of compassion," Kirby said. 

Service members with preexisting conditions who are advised against being vaccinated by their doctors would be exempt from mandatory vaccinations, Kirby said, adding their may also be possible exemptions on religious grounds. 

Service members outside those two categories who still object will be offered a chance to sit down with a physician and have that physician communicate to them the risks that they're taking by being unvaccinated, Kirby said. 

They'll also be offered a chance to sit down with those in their chains of command to talk about the risks that their objection will impose on the unit and on the fore on their teammates, he added. 

"Commanders have a wide range of tools available to them to help their teammates make the right decision for themselves, for the families, for their units, and the secreatroy expects that they commanders will use those tools, short of having to use the UCMJ," he said,  referring to the Uniform COVID of Military Justice.