IE 11 is not supported. For an optimal experience visit our site on another browser.
  • UP NEXT

    Watch: North Korea blows up parts of inter-Korean road on its side of border

    00:46
  • Pro-Palestinian protesters demonstrate outside the New York Stock Exchange

    00:22
  • Harris calls Trump too 'unstable' and 'unhinged' to be president

    02:13
  • Minnesota teacher wins California contest with 2,471-pound pumpkin

    01:17
  • Bill Clinton says election comes down to 'whether we can get an honest, open count'

    00:38
  • Vance says the 'enemy from within' includes foreign nationals

    00:53
  • Clinton knocks Trump for denying knowledge of Project 2025

    01:32
  • Deadly Israeli strike on Gaza's Jabaliya camp 'came without warning,' eyewitness says

    00:56
  • China launches its latest round of war games around Taiwan dubbed 'Joint Sword-2024B' drills

    00:54
  • Israeli airstrike sparks deadly fire at camp for displaced people at Gaza's Al-Aqsa Hospital

    01:44
  • Trump announces plans to hire additional 10,000 border agents

    02:29
  • Footage shows rubble of Lebanese market after Israeli airstrikes

    00:35
  • SpaceX’s Starship rocket booster successfully returns to launch tower's arms

    00:59
  • Multiple people shot after TSU homecoming parade

    01:51
  • Rescuers patrol floodwaters in Florida after Milton

    01:11
  • Trump calls for death penalty for migrants who kill U.S. citizens

    00:46
  • Aurora police chief says the city is still 'very safe' despite Trump's claims

    01:00
  • Trump says he will ‘rescue’ towns like Aurora that have been ‘invaded and conquered’

    01:13
  • Biden continues to denounce 'disgusting' spread of misinformation about storm response

    01:14
  • Climate activist Greta Thunberg ties Palestinian rights to 'climate justice'

    00:54

From smallpox to the coronavirus: The history of vaccinations explained

05:03

Dr. Josefa Steinhauer explains the history of the first human vaccine and the early days of the anti-vaxx movement.