with mucinex nightshift you've got powerful relief from your worst nighttime cold and flu symptoms. so grab nightshift to fight your symptoms, get your zzz's... and get back to your rhythm. ♪ the relief you need. the cash you want. a lot of people believe, including myself, the reason it's manifesting as a less severe illness is probably because we have baseline immunity in the population, so even though it's spreading by the immunity we've acquired, we have a baseline immunity that protects us from getting very sick. >> commissioner scott gottlieb.