If you live or plan to travel where Lyme disease is a problem, there are important facts you should know. For example, you can get bitten by the tick (扁虱) that carries the disease while out gardening, walking, even playing with your dog. And, if you don’t have any early symptoms, you might not know you have Lyme disease. You could be one of the few people who develop serious health problems. Left untreated. Lyme disease can lead to potentially serious joint and neurological (神经病学) conditions. Why put yourself or your family at risk
Now, there’s a vaccine (疫苗) that has been shown to be safe and effective in pring Lyme disease. It’s called LYMErix. New LYMErix for people 15 to 70. As with any vaccine, LYMErix may not protect 100% of individuals. LYMErix may be associated with local reactions including redness and swelling, full-like symptoms.
Ask your doctor about new LYMErix, or call toll free 1-888-LYMERIX, ext 200 for information.
Now is the time to begin building protection for yourself and your family for the upcoming season. Call your doctor today.It's indicated in the passage that something important should be known for us（）

A．if you live wherever there is Lyme disease
B．when you go out gardening or walking
C．if you are playing with your dog
D．when you are traveling around