It's hard to offer more than encouragement because you don't specify what infections your mom has. There are a lot of infections in the blood stream. Is she septic? Bottom line, you mother probably has a very weakened immune system at this point, so infections are probably difficult for her to fight off without antibiotics. Spend as much time with her as you can, even if she's unconscious. There is a lot of evidence that people who are unconscious or in coma's are peripherally aware of people around them and it could help to bolster her mood and keep her from giving up. Read to her, or play her favorite music, talk to her. If you're religious, pray for her. I know this is very scary- I hope things get better.