👉 Counterblast is a process in medicine where a person's immune system fights off an infection through a procedure called vaccination, also known as immunization. This can be done by exposing the patient to a harmless virus or bacteria that has been weakened so it won't cause harm. The term "counterblast" refers to the process of using a vaccine that is not harmful to the patient to prevent them from getting sick again. By preventing infection, this reduces the need for more frequent vaccinations and can help protect
