I threw a party the other day, and it was a riot! The exclusive guest list included my roommates Anthony, Sarah, Michael, & Lincoln, as well as my friends Elsa, Kayla, and Dylan; my cousin Emma even showed up! Other invitees included Gwyneth Paltrow and Jude Law–they couldn’t make it for some reason–and Matt Damon, but he was out of town or something. Nonetheless, fun was had!
Here’s a picture of the party set up!
After the party, it was brought to my attention that one of the guest had contracted a contagious disease within the last 24 hours, but were unaware at the time because they weren’t showing symptoms yet.
I thought back to the events of the party and recalled much sharing of drinks (my friends are very generous), and if one person at the party had a disease-causing microorganism, surely it got spread to at least one other person.
I took samples of everyone’s drink from that night, and tried to remember who shared who’s drink.
If I remember correctly, the night went something like:
Anthony shared his drink with Michael first, and then with Kayla and Emma after that. Elsa also shared her drink with Kayla, and then with Lincoln. Sarah isn’t big on sharing, but she did give Dylan some of her drink at some point. Michael dropped his beverage, so Emma offered him some of hers and after that let Dylan have a drink. Kayla and Sarah also mixed up their drinks on accident.
In case that’s confusing, I made a diagram (which also might be confusing):
To each drink sample I added a few drops of phenolphthalein, which turns pink in the presence of bases, such as sodium hydroxide (which was identified as being the contagious disease). Here are the results:
It’s unclear who showed up with the disease, but half of the guests ended up leaving with surprise party favours.
The lesson to be learned here is don’t share drinks; anyone could be carrying something contagious on the down-low.
And you should also probably avoid Sarah, Lincoln, Elsa, & Kayla for the next few weeks..