Major test of first possible Lyme vaccine in 20 years begins

Researchers are seeking thousands of volunteers in the U.S. and Europe to test the first potential vaccine against Lyme disease in 20 years

Lyme is a growing problem, with cases rising and warming weather helping ticks expand their habitat.

While a vaccine for dogs has long been available, the only Lyme vaccine for humans was pulled off the U.S. market in 2002 from lack of demand

Now Pfizer and French biotech Valneva are aiming to avoid previous pitfalls in developing a new vaccine to protect

both adults and kids as young as 5 from the most common Lyme strains on two continents.

There wasn’t such a recognition, I think, of the severity of Lyme disease” and how many people it affects the last time around

Robert Terwilliger, an avid hunter and hiker, was first in line Friday when the study opened in central Pennsylvania.

He’s seen lots of friends get Lyme and is tired of wondering if his next tick bite will make him sick.

It’s always a worry, you know? Especially when you’re sitting in a tree stand hunting and you feel something crawling on you

said Terwilliger, 60, of Williamsburg, Pennsylvania. “You’ve got to be very, very cautious.