Cdc - centers for disease control and prevention (cdc) - youtube
this video demonstrates how to correctly collect and transport a nasopharyngeal (np) aspirate for pertussis diagnostic testing. determining who has pertussis can be difficult. whenever possible, a . secretly record video and audio without anyone knowing with these stealth spy sunglasses that cost less than $40. now you can have your very own hidden camera! think of the possibilities! join the .