Always be prepared, and keep up with advancements.
There is always some new problem brewing around the corner, which is why preventative care is so important. Manage your problems before they are problems, and they don't become problems. Vaccinations for deer are the tip of that iceberg and cannot be avoided in pursuit of healthy herds.
Unfortunately, there are no commercially available vaccines specifically made for deer. Some companies are making autogenous vaccines for deer. These vaccines are made from bacteria and viruses isolated from a few farms in different areas of the US. The efficacy of these vaccines is variable, but it is the best option that we have for deer today. A veterinarian is required to complete and submit specific forms to order these vaccines for deer farms. Appropriate management, husbandry, and nutrition is required for vaccines to have any chance to help protect deer from certain diseases.