House Democrats are investigating Health and Human Services Secretary Robert F. Kennedy Jr.’s efforts regarding the bird flu outbreak.

In a Tuesday letter, Reps. Raja Krishnamoorthi (D-IL), Emily Randall (D-WA), Wesley Bell (D-MO), Lateefah Simon (D-CA), and House Oversight and Government Reform Committee ranking member Gerry Connolly (D-VA) wrote to Kennedy inquiring about recent comments he made about the outbreak. The members of Congress argued that Kennedy’s recent comments appeared “to minimize the health and economic threat” that the bird flu poses.