comorbidity

noun

1. (uncountable)The presence of one or more disorders (or diseases) in addition to a primary disease or disorder.

   “Extensive comorbidity is the hallmark of immunodeficiencies.”

   “The reported comorbidity between categorical personality disorders and OCD ranges between 33 and 87 percent (Bejerot et al, 1998).”

2. (countable)A disease thus coexisting.

   “Coronary artery disease is often a comorbidity of diabetes mellitus.”

   “Yet in private conversations, members of his staff were also candid that the president has comorbidities that could make him more susceptible to a severe bout of the virus.”

3. (uncountable)The effect of such additional disorders or diseases.