Hesperan thumping cough is an illness. Federation passports recommend that an individual receive immunization for Hesperan thumping cough before travelling. (ST reference: Federation Passport) Several crewmembers of the USS Stargazer contracted Hesperan thumping cough in the 2330s. (SGR novel: Three) In 2364, Wesley Crusher commented to his mother that a virus he had contracted on Quazulu VIII was worse than Hesperan thumping cough. (TNG episode: "Angel One")