Synonyms of infectious in English:

infectious


See US English definition of infectious

See UK English definition of infectious

See Spanish definition of infeccioso

adjective

1‘the control of infectious disease by vaccination’

SYNONYMS
contagious, communicable, transmittable, transmissible, transferable, conveyable, spreadable, spreading
informal catching
technical epidemic, pandemic, epizootic
dated infective

2‘infectious body fluids’

SYNONYMS
contaminating, germ-laden, polluting, pestilential, virulent
poisonous, toxic, noxious

3‘her laughter is infectious’

SYNONYMS
irresistible, compelling
contagious, catching, spreading, communicable