Pfizer to Seek Approval for Lyme Vaccine as Vermont Ranks High in Cases

The new vaccine comes as Vermont continues to have one of the highest rates of Lyme disease in the U.S.

Mar. 31, 2026 at 7:46pm

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An extreme close-up X-ray image revealing the intricate internal anatomy of a blacklegged tick, the vector for Lyme disease, against a dark background, conceptually illustrating the public health challenge posed by this tick-borne illness.A new Lyme disease vaccine could provide critical protection against the tick-borne illness that continues to plague high-risk regions like Vermont.Burlington Today

Pfizer has announced plans to seek regulatory approval for a new Lyme disease vaccine, as Vermont remains one of the states with the highest incidence of the tick-borne illness in the country. Lyme vaccines have had a troubled past, with one previously approved version being pulled from the market due to concerns about potential side effects, even though the FDA concluded it was safe.

Why it matters

Lyme disease can have serious health consequences if left untreated, potentially spreading to the joints, heart, and nervous system. A new effective vaccine could help protect residents in Vermont and other high-risk areas from contracting this debilitating illness.

The details

Lyme disease is caused by bacteria found in blacklegged ticks. Vermont's high rate of Lyme cases is likely due to the prevalence of these ticks in the state's wooded and rural areas. Previous Lyme vaccines have faced challenges, with one approved version being withdrawn from the market in the early 2000s due to concerns about potential side effects, even though the FDA determined it was safe.

  • Pfizer announced plans to seek regulatory approval for the new Lyme vaccine in March 2026.

The players

Pfizer

A major pharmaceutical company that is developing a new Lyme disease vaccine.

Vermont Health Department

The state agency that has reported Vermont ranks among the highest in the U.S. for Lyme disease cases.

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What’s next

If approved, the new Lyme vaccine could provide an important tool to help protect residents in Vermont and other high-risk areas from contracting this serious illness.

The takeaway

The development of a new, effective Lyme disease vaccine is a significant step forward in addressing the growing public health challenge posed by this tick-borne illness, especially in regions like Vermont that have been disproportionately impacted.