認真答的話
因為一般通稱嘅感冒可以由好多種病毒引起
// More than 200 viruses can cause a cold, but rhinoviruses are the most common type.//
https://www.cdc.gov/antibiotic-use/colds.html
常見啲嘅例如鼻病毒 rhinovirus、腺病毒adenovirus
要逐隻病毒開發藥物就太難
雖然都唔係無
https://en.wikipedia.org/wiki/Rhinovirus#Novel_antiviral_drugs