"Greetings"
This is the way the letters from the draft board would announce that you just have been selected for service into the military and I would suggest any entering medical student needs to assume that they will be drafted into service this coming year, though likely as aides or nonclinical work such as housekeeping, food service, etc. If you get a choice not to volunteer, it will likely be remembered and reflected 4 years later when you start looking for residency letter. And of course, in the end, you all can be "drafted" or rather all the medical schools in the country can be essentially compelled to do so assist in this. Let me explain
This is the reality when the "war" we are fighting is with a pandemic and the public health is the force we have to fight it with. BTW, the US Public Health Service is one of the eight uniformed service branches in the US. Legally, as individuals you cant be directly drafted into service. However, with a declaration of a national emergency as well as declaration at the state and local levels does give power to the PHS to press doctors, nurses, and non-medical personnel into work for the emergency. There is no doubt that they could do so for medical students as well as non medical staff at the schools. In NYS they have started to "draft" non-medical staff from medical insurance companies into jobs such as security at a hospital.
Ultimately, with millions sick and out of work, millions of others not working to take care of those at home sick, they will be looking for warm bodies to do many of the nonclinical jobs at the hospitals. And I will tell you, whether you want it or not, assume that your medical school orientation maybe "here is a pair gloves, here is a mask, dont lose it, now follow me." Your only option may likely be to withdrawal your acceptance. And this will go on for 6 to 24 months depending on when we have both a widespread vaccination program and antibody testing
This is what happens in war, it changes plans and changes lives. Scream all you want, but I promise, you all will be working on the front lines or close to it, the from almost the moment you show up on campus. Your first year may not actually start until next year and there not be an application cycle at many schools this cycle.