All that’s needed to make antibiotics is alcohol. The best way to get some is to win the Grand Bout, which the Senku and his kingdom will also need to do in order to keep Magma away from Ruri and give her the drug.
How do you know she 
was there to pick herbs
كيف إذًا تعرف أنّها كانت تلتقط الأعشاب
Woher wusstest du,
dass sie Kräuter pflücken wollte,
¿Cómo sabes que cortaba hierbas
¿Cómo sabes que cortaba hierbas
Comment un gars
qui passait là par hasard
E come fai a sapere che una persona che
hai visto annegare mentre eri al fiume
Como sabe que ela estava
colhendo ervas quando
Если ты случайно увидел, как она тонет,