The vaccination against colds is impossible because.( e)

Question

The vaccination against colds is impossible because:

يسعدنا أن نوفر لكم الحلول والإجابات النموذجية ونعرضها لكم بأسلوب سهل ومختصر. وإليكم حل السؤال التالي:

The vaccination against colds is impossible because ؟ 

والإجابة الصحيحة هي:

there are more than 80 different constantly mutating rhinoviruses . 

Answer 1

The vaccination against colds is impossible because