A syndemic is a group of two or more diseases that synergistically produce bad outcomes like morbidity/mortality. They are diseases that come together because they share the same roots, which are often health conditions induced by health inequality (poverty, stress, structural violence, or social stigma). A syndemic is different from co-/multi-morbidity because it refers to biocultural, sociocultural, or sociopolitical interactions. Comorbidity refers more specifically to the diseases, not other factors, and they don't necessarily interact or have underlying factors that lead to both/all of them. An example of a syndemic with infectious diseases is AIDS and TB, as they interact with each other, and can both originate from the same social conditions. A syndemic with non-communicable diseases is VIDDA (violence, immigration, depression, diabetes, abuse), where depression and diabetes can be caused by the other social factors, and can feed off of each other.