Learn how to say Infectious correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word infectious:
1(of a disease or disease-causing organism) liable to be transmitted to people, organisms, etc. through the environment:
outbreaks of infectious diseases
was polyneuritis infectious?
a highly infectious virus
liable to spread infection:
the dogs may still be infectious
2likely to spread or influence others in a rapid manner:
a loud infectious laugh
her enthusiasm is infectious
On the differences in meaning between infectious and contagious, see contagious (usage).