1. relating to or caused by a virus
Usage: medical
2. spreading rapidly and widely on the internet or through social media
Usage: informal

Examples

• The doctor confirmed it was a viral infection, not bacterial.
• She took antiviral medication to treat her flu.
• The funny cat video went viral overnight.
• His tweet became viral within hours.
• The viral marketing campaign reached millions of people.
• Viral pneumonia can be serious if left untreated.
• The dance challenge went viral on social media.