Loid tries to pick out souvenirs that will make him look like a fun and happy dad so he can cheer Anya up. Meanwhile, Yor was facing off with Sickle-and-Chain Barnaby.
Just as they discovered 
viruses and vaccines...
...عندما يكتشفون فيروسًا أولقاحًا جديدًا
und so Viren und Impfstoffe entdecken.
Descubrieron virus y vacunas…
Descubrieron virus y vacunas…
en détectant des virus
et en créant des vaccins.
Proprio come quando scoprono 
nuovi virus o vaccini...
assim como descobriram
vírus e vacinas...
Как учёные находят вирусы
и  придумывают вакцины…