Is the drug administration method with the highest risk of transmitting diseases such as hepatitis and aids.

The given blank can be filled with vaccination, that is, injection with needle.

Explanation:

Use of syringes, needles, or other equipment of injections to administer drugs has put individuals at threat for transmitting or acquiring infections like HIV and hepatitis. The threat for transmitting or acquiring HIV and other infections becomes greater if an individual with negative with HIV or other diseases like hepatitis uses injection apparatus, which someone positive with the disease has used. This is due to the fact that the needles used may possess blood that would have carried HIV and another deadly disease with it.

the millers tale is the answer.