Salk's vaccine target
THE ANSWER IS
The answer is POLIO.
Tap reveal when you’re ready—the letters stay hidden until then.
Why it fits
POLIO is the 5-letter answer to “Salk's vaccine target” in the May 9, 2020 Lexigo puzzle. Every answer must also trace a connected path across touching hexagons, with each word linking to its neighbors in the chain—so POLIO both satisfies the clue and fits the day’s board.