yep, you are entirely correct that their preferred choice of method, is to misuse antibiotics with the aim to create super-resistent strains of unrelated diseases, fully knowing it doesn't work for most colds anyway.Well, she just speed-ran the relationship…somehow.
Also, I am not a medical professional but I am pretty sure that’s not how the Japanese handle colds.
How can it be a new low when it's been shown in manga since the dawn of humanity?You absolutely cannot cure a cold by giving it to someone else. This is a new low for Japanese cold treatment.