First of all, I hope your classmate can get well soon. Depending on the condition of the patient, some people may not be able to eat or something, but it is not impossible to send food, you can take it home, anyway, it is a token of your thoughts, which will make your sick friend happy and help him recover.
Therefore, you can first send flowers, which are full of vitality. You can also choose some nutritional supplements, or foods that your friends like to eat. Generally speaking, eggs, milk, fruits, etc. are more common, or you can consult a doctor about what your friend can eat to help him recover, and buy some to send to your friend.
You can also send some customized personalized gifts, such as cartoon flowers, blessing chocolates with your own blessing words. Sending gemstone jewelry has the meaning and effect of exorcising evil spirits, such as agate bracelets, etc. In short, it is a token of your thoughts, which makes your classmates happy.