Eat as well as you can- we know that fresh is not an option
Sleep 7-8 hours a night NOW you have the time
When you can eat fresh fruits & greens- try a frozen fruit smoothie
Do exercise - be creative indoors - exercise bands, indoor weights
Stop STRESS - try not to focus on economy and money. Yes easier said than done
Take natural enzymes that DO boost your immune system
When all else fails a multi vitamin
Evidence suggests that trypsin, papain and other proteolytic enzymes can break up existing pathogenic immune complexes and even prevent their formation in the first place, enhancing lymphatic drainage. This provides a stimulatory effect on the immune system, meaning proteolytic enzymes are natural immune system boosters. This makes them beneficial for people with conditions tied to high levels of immune complexes or autoimmune diseases, rheumatoid arthritis, lupus, scleroderma, and multiple sclerosis.