Hmm... Well that is a question you should never really be asking the internet, or trying to make guesswork. Usually Streptococcus infections are tested for a variety of features and then dosages are prescribed based on progression and strain of the bacteria. One thing is for certain though, you follow a doctors dosage and specific medication requirement. If you are asking this question because you think you might have a Strep infection, and you do happen to have left over antibiotics... do not take them, If the medication hasn't been tainted in the first place, it's a good way to get certain antibiotic resistant infections.
Toss them in the trash, see your doctor for a prescription and dosage requirements, and follow through with that current prescription.
I don't get the last one, so I'll give you the first 2.
COmmuicate:
1. Ask the problem: make sure to listen
2. Show you care about them: give them a reason to live
Offer Help:
1. Tell them that if they need anything, you will be there to help/
2. Get them a Psychiatrist, and tell them they will help
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Yes. It protects against 90% of cervical cancer in women, protects against 90% of genital warts in men and women, and protect against cancer in the genital area when you are older. Signs of HPV are genital warts and itching, but do not always show symptoms. It should be mandatory in my opinion because sexual partners are not always honest, and if a simple shot can prevent life threatening cancer it should be a necessity.
Answer: the antigens identify the foreign invader