marine biologists is saying the suez canal is becoming a one-way corridor of invasion. the story here on cnn "newsroom" straight ahead. t heart disease? [man grunts] one wishful thinking, right? but there is one step you can take to help prevent another serious disease-pneumococcal pneumonia. one dose of the prevnar 13® vaccine can help protect you from pneumococcal pneumonia. an illness that can cause coughing, chest pain, difficulty breathing, and may even put you in the hospital. prevnar 13® is used in adults 50 and older to help prevent infections from 13 strains of the bacteria that cause pneumococcal pneumonia. you should not receive prevnar 13® if you've had a severe allergic reaction to the vaccine or its ingredients. if you have a weakened immune system, you may have a lower response to the vaccine. common side effects were pain, redness, or swelling at the injection site, limited arm movement, fatigue, headache, muscle or joint pain, less appetite, chills or rash. even if you've already been vaccinated with another pneumonia vaccine, prevnar 13® may help provide additional protection.