You never can be sure, my grandma has been on the decline for a few years now and at 96 it's not surprising, cognitive and physical. She tested positive for Covid earlier this year but had no real symptoms other than a loss of appetite and being a little tire. A week later she was eating normally and a week after that she tested negative. Covid is just one of the scares we've had with her this year but she always bounces back. Hopefully I'll be able to visit her sometime next year.
Here's hoping she makes it to centenarian status! ort