Recent research has revealed that weight loss surgery could have a positive effect on the body's immune system.
Conducted by scientists in Australia, the study found that even a modest reduction in weight could reverse a lot of the damage done to cells responsible for immunity.
The research was conducted at the Garvan Institute of Medical Research in Sydney and patients were helped to shed the pounds initially through a change in diet and eventually by gastric banding.
Associate Professor Katherine Samaras, from institute, commented: "The situation has reached crisis point, and people must be made aware that excess fat will affect their immune systems and therefore their survival."
She added: "We have found that a modest weight loss of about 6 kg is enough to bring the pro-inflammatory nature of circulating immune cells back to that found in lean people."
According to the researchers, people with Type 2 diabetes are at particular risk of developing a weak immune system.