Which of the following is the correct method to administer Tdap vaccine to an adult woman who weighs 195lbs?
1) Subcutaneously at a 45-degree angle in the outer aspect of the upper arm
2) Subcutaneously at a 45-degree angle in the deltoid muscle
3) Intramuscularly at a 90-degree angle in the deltoid muscle
4) Intramuscularly at a 90-degree angle in the outer aspect of the upper arm