Is there a quick way to boost the immune system? This is for my 23 year old non-furry kid. She was prescribed prednisone 2 weeks ago for an allergic reaction to latex gloves. Then last Friday she developed a sore throat and was prescribed pennicilin and prednisone. Now she's really sick. I'm so frustrated because she works on a small cruise ship so she's not at home. I really hate prednisone.