Obesity, immunity and vaccination

Vaccines are a fundamental tool in the prevention of infectious diseases. Following vaccination, a complex interaction takes place between the vaccine product and the recipient's immune system, the result of which is protection against the disease. High variability is observed in both individual and population immune responses to vaccination; at present, these differences are not well understood. Some well-studied receptor factors such as age, sex, genetics, immune history … however, others such as overweight and obesity are less well known. There is evidence that a very high body mass index is an important risk factor for infections in general and that fatty tissue has a clear role in modulating the immune system; suboptimal levels of vaccine seroconversion have also been observed in obese people. Throughout the document a review of the immunity and protection induced by various vaccines in overweight people is presented. Reactogenicity to vaccines in people is also being studied. Finally, the relationship between the microbiome, immunity and obesity, which is the subject of recent research, is exposed.