What is the immunodominant sugar of the A antigen?

You are explaining to your EMT partner how he can differentiate tension pneumothorax from a simple pneumothorax. Which of the following would you tell him indicates tension pneumothorax?

A) Jugular venous distension B) Mild to severe shortness of breath C) Decreased lung sounds on affected side D) Tachycardia related to anxiety

The most effective vaccines are made from

A) inactivated pathogens B) living organisms C) toxins D) extracts