Absolutely my friend, and we simply cannot blame our loved ones for their fears. At a time such as this, it is indeed very difficult to trust anything or anyone outside of what are perceived as the experts. If either of my sisters were similarly stricken, I'd be in the same boat as you. I'm pretty sure they consider me a nut case. It is what it is, free will reigns.
Aside from all else, the human body is resilient and often manages to maintain itself under the harshest of circumstances. This is my heartfelt wish.
My love and dearest thoughts for your sister, you, and all your family.
-Logan