I was wondering something similar, but with something more to go with that too. Just found out that my independant, almost 80 yr old dad (lives alone too), fell off his horse and cracked two ribs. He'd gone to a chiro, thinking he probably needed an adjustment. The chiro xrayed him and found they were cracked close to the spine, up high. He landed on his shoulder. The chiro told him to make sure he concentrates on deep breathing both in and out, because especially with older people, they can get complications of pneumonia.
The doctrine is running for him and I get yes for it working to stop the bugs before they get much of a start. But, I got no for frequencies being in the doctrine for healing cracked bones...until I then asked specifically for frequencies to be added for that, and am now getting yes.