Sorry to hear about your father's cancer, and trust that it can be treated.
Having been hospitalized a couple of times in the past year I know that it
will be very difficult to get anything to your father while he's there -
particularly while on oxygen. I would also either go really slow if you
use MMS, or not even do it at all because of his age. I came down with the
worst cold and fever that I've had in years when I started, and I was only doing
3 - 4 drops twice a day. If you read this forum you will find that
catching a cold is common while starting MMS.
If I were to make suggestions, I'd point you in the direction of Essiac tea
and pau d'arco. Essiac has helped many who were on radiation therapy, and
pau d'arco seems to work well with it.
Here is a cure zone link to a woman who used Essiac and pau d'arco to cure
her cancer. Both of these items are herbal in origin and are not
destructive to the body in any way.