You have allergies, and your doctor thinks allergy immunotherapy, or allergy shots, might help you feel better. The goal of allergy shots is to improve your allergy symptoms. But, there can be side effects. Those side effects are around the injection site, like pain, itching, bleeding, or swelling.
A formal sanction is a reward or punishment given by a formal organization or regulatory agency, such as a school or government. An informal sanction is a spontaneous expression of approval or disapproval given by an individual or a group, such as a standing ovation or gossip.
It is also associated with official norms. Formal and informal are antonyms to each other. Formal defines an official style or manner. On the other hand, informal can be associated with a casual or a friendly manner. Thus, anything that is associated with the 'formal' attribute is regarded to be in accordance to certain rules and regulations or based on a standard format. Informal is just the opposite of formal. Something that is informal need not follow rules or regulations.