herd immunity

Omicron & the undoing of China's COVID strategy

GZERO World with Ian Bremmer

Omicron & the undoing of China's COVID strategy

In China, Xi Jinping's zero-COVID approach faces its toughest test to date with omicron. Why? Because China lacks mRNA jabs, and so few Chinese people have gotten COVID that overall protection is very low.

COVID vaccine development could be damaged by politics, says former US Surgeon General

COVID vaccine development could be damaged by politics, says former US Surgeon General

"When we already have enough challenges with people understanding the science behind vaccines, we cannot afford to allow the development and approval of a vaccine to be further politicized," Dr. Vivek Murthy told Ian Bremmer on GZERO World. The former US Surgeon General expressed concerns that politics could hurt the process of development and distribution while shaking public confidence. He also discusses the current state of development for a COVID-19 vaccine, and possible scenarios for its efficacy once available.

Ask an epidemiologist: Harvard's Marc Lipsitch answers your COVID questions

Ask an epidemiologist: Harvard's Marc Lipsitch answers your COVID questions

Do masks really protect us? Are children less vulnerable to COVID-19? And why do scientists hope you avoid indoor bars? This week, GZERO World is taking all of our burning questions about the latest in the pandemic to a Harvard epidemiologist. Marc Lipsitch is a Professor in the Department of Epidemiology at the Harvard T.H. Chan School of Public Health and the Director of the Center for Communicable Disease Dynamics. So, he knows his stuff!