prophylaxis

It is hoped it will replace the current form of HIV preventative drug, know as PrEP, or pre-exposure prophylaxis, which is taken orally and also costs $40 per person each year.

The CDC supports providing such post-exposure prophylaxis to all asymptomatic household contacts within 21 days of when a whooping cough patient starts coughing.

Officials call the treatment doxy PEP, short for doxycycline postexposure prophylaxis.

The patient was treated with an antiviral right away, and close contacts were given post-exposure prophylaxis.

"This could be a potential broad spectrum antiviral treatment and prophylaxis."