Meaning & use
infection
The invasion and multiplication of harmful microorganisms in the body, often causing disease.
See it in a sentence
The untreated cut developed a bacterial infection that required a course of antibiotics.
Doctors isolated the patient to prevent the infection from spreading to others.
A note on using this word
Infection specifically involves pathogens like bacteria or viruses, distinct from inflammation, which is the body's response and can occur without infection.
Words with a similar meaning
contaminationcontagion
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
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