What to read around the web today

• Even many who support Trump’s drug rebate policy don’t support it in Medicaid. STAT Plus
• We asked all of the 2020 presidential candidates their thoughts on vaccines. Here's what they said. Buzzfeed News
• Does testosterone really give Caster Semenya an edge on the track? The New York Times
• How drug companies helped shape a shifting, biological view of mental illness. NPR
• Hundreds quarantined on cruise ship in St. Lucia because of measles infection. The Washington Post