What is the answer to "Basis of some vaccines" in the WSJ Crossword?

The answer to the WSJ Crossword clue "Basis of some vaccines" is RNA (3 letters).

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Basis of some vaccines WSJ Crossword Clue

Across clue · from the May 9, 2026 puzzle

Stuck on “Basis of some vaccines” from the Wall Street Journal Crossword? Here is the verified answer:

Answer

RNA

3 letters · Across · last seen May 9, 2026

1DPetulant feeling5 1ATop-notch5 10DFather who empowers his daughters7 100AQuick to put up, perhaps6 100DFirebug4 101DJackie of action films4 101AIs really hurtful8 102DSoundly defeat4 103ABrochure advertising shape-enhancing underwear?9 104DMuscle targeted on a rowing machine3 105AInsect staying at a guesthouse?11 106DPut to the test3