infection

1. The act or process of infecting. (countable, uncountable)
2. An uncontrolled growth of harmful microorganisms in a host. (countable, uncountable)
3. A disease caused by such presence of a pathogen. (countable, uncountable)
4. A visible sign of such a disease, such as the suppuration of a wound. (countable, uncountable)

Plural infections