Nature

The need for a clinical case definition in test-negative design studies estimating vaccine effectiveness

Test negative studies have been used extensively for the estimation of COVID-19 vaccine effectiveness (VE). Such studies are able to estimate VE against medically-attended illness under certain ...
Nature

Bias assessment of a test-negative design study of COVID-19 vaccine effectiveness used in national policymaking

National test-negative-case-control (TNCC) studies are used to monitor COVID-19 vaccine effectiveness in the UK. A questionnaire was sent to participants from the first published TNCC COVID-19 vaccine ...
Forbes

Jay Bhattacharya Called Test-Negative Study Design ‘Crap.’ Here’s 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 ...
Yahoo

You can still be contagious with COVID if you have a negative test — here's why

Add Yahoo as a preferred source to see more of our stories on Google. As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, ...