A person is more likely to fall sick when she is on a four-day fast after recovering from malaria and is taking care someone suffering from chicken pox. This is because since she has suffered from malaria and is in the recovery phase, it means that she is still not completely diseases-free. Fasting affects the immune system as the body is deprived of essential nutrients required to maintain a healthy body. Chicken pox is a contagious diseases, this also makes her susceptible in contracting the disease while taking care of a person suffering of chicken pox.