Final answer:
Michelle's friend most likely had a communicable disease, which she contracted after spending a weekend taking care of her friend with similar symptoms.
Step-by-step explanation:
Michelle's friend most likely had a communicable disease. A communicable disease is an illness that can be spread from person to person through various means such as respiratory droplets. Since Michelle's symptoms are the same as her friend's, it suggests that she contracted the illness from her friend.
Learn more about communicable disease