Despite shots inside the pharmacy not being the ones most relevant to Baltimorians' health, that city's just spawned Sickweather, which crowd-sources real-time data from social networks to report trending symptoms, and was created by a group of dudes who grew up “playing in bands and sharing germs”, so they must have been primarily covering Biohazard.
After using proprietary algorithms to crunch nationwide data culled from Facebook and Twitter (and soon Google+!), SW displays concentrated groups of symptoms as large orange polygons on a "sick map"; zoom in, and it'll even geolocate individual instances of people talking about sickness, so hopefully you don't live near a skate park, or it'll just get really cluttered.
Connect via Facebook and Twitter yourself, and it'll then filter out and organize all the instances of your friends posting anything about their current symptoms so you know who to avoid making out with; soon, you'll be able to post directly from the site to said social networks about what you’re currently feeling, which will always be "pretty cool, because I can now post without having to use Twitter".
And if you’re already stricken, the map also displays local grocery stores, pharmacies, and hospitals in your area to ensure there are no holes in your recovery plan, even if you live in Baltimore, and there are several in your body.