The crossword solution for the term 'LIKE MANY VACCINES' is ORAL, which has four letters. ORAL vaccines are a type of vaccine that is administered through the mouth, usually in the form of a pill or liquid. These types of vaccines are often used to protect against diseases such as polio, rotavirus, and typhoid. They are also used to prevent the spread of certain viruses, such as the flu. ORAL vaccines are generally considered to be safe and effective, and they are often preferred over other types of vaccines due to their convenience and ease of administration.