Acting CDC Director Jay Bhattacharya Called A Vaccine Study Design ‘Crap.’ What The Test-Negative Design Is And How We Know Whether Vaccines Measured With It Are Effective

WASHINGTON, DC – MARCH 5: Jayanta Bhattacharya, U.S. President Donald Trump’s nominee to be Director of the National Institutes of Health, speaks at his confirmation hearing before the Senate Committee on Health, Education, Labor, and Pensions on…