In a perfect pre-collapse world, all members of your survival group would have a robust amount of medical training, with certifications or not, and may include up to EMT-Paramedic training. It may be possiblle for you to recruit a Medical Doctor, specialist or not, into your survival group.
Do you know where Doctors, Nurses, Veternarians, Dentists and other medical professionals live in your vicinity? If not, then maybe that would be a good idea to know where they live. And while you may not want to knock on their door and ask them to be a part of your survival group now, after the life changing events of a collapse this may be a much more viable concept. Certainly you could barter for their services.
Even if medical professionals and their services were available to your survival group after a collapse, it would be not only a great idea but an essential requirements that members of your survival group possess base line, first response medical training at a minimum.
The ability for all your survival group members to be capable in CPR is a basic skill. Guidance and procedures for CPR change from time to time. Continuous Chest Compression CPR, developed at the University of Arizona College of Medicine, is a hands-only CPR method that doubles a person’s chance of surviving cardiac arrest. It’s easy and does not require mouth-to-mouth contact, making it more easy to learn and more likely that it would be employed when needed.