Figure 5From: Nasal lavage natural killer cell function is suppressed in smokers after live attenuated influenza virusSchematic of LAIV Study Design. Nonsmokers and smokers were given a baseline nasal lavage followed by inoculation with LAIV on Day 0. Serial nasal lavages were obtained on Days 1-4 and again on Day 9. Urine was collected throughout to study to measure cotinine, a metabolite of nicotine, as a marker of cigarette smoke exposure.Back to article page