@louloute0203 I agree, in mangas the Cold is basically a sudden onset disease with high fever forcing the affected to be bedridden and that pass after a literal day.
The only other symptom they make is usually cought, but even that is rare. Sneezing and Running nose, that are the 2 most common symptom, are virtually unheard of.
In adults and adolescents actually fever for colds is actually rare, and even that the should rarely be on a temperature that cause fainting or deliriums . Albeit in this case they use the blood sucking as excuse, and it certain ways it could make sense.
Another stuff that make me in pain, is that when in mangas there is a contagion risk, the symptom of the other person start the very next day (incubation period this unknown) and at max intensity (most serious symtomps appear a 1-2 days after the milder symptoms onset)
In this case I can understand the other girl panic as she's not knowledgeable with humans diseases. Actualy using ice or similar to bring down is not actually recommended unless either the temperature is extermly high (> 40 C) or it's the result of externel hypertermia (as in heat exhaustion or heat stroke). (And you ar esupposed to misure it as above 39.5 C temperatures could indicate seriuous enough conditions to warrant medical attention, sometimes emergential)