#legal ways>

I am a man of military age and I want to know if there are legal ways to avoid mobilization? I have heard that medical commissions sometimes decide that I am unfit for military service due to health conditions. What specific diseases can be the basis for this and how can this be done in accordance with the law?

Are there really restrictions on resuming university studies after 25 years that make it impossible to obtain a deferment from mobilization, and are there legal ways to circumvent them?