"Global COVID-19 herd immunity will take two or three years"

I think the biggest misconception is that it is a magic bullet: that this is the solution, a solution that means right now people do not have to implement any changes in their behavior. I worry because people know the vaccine is coming and they have stopped wearing masks, stopped physically distancing, stopped avoiding mass gatherings.

People want to see their families, but the more social mixing they do, the greater the spread of the virus is going to be. The greater spread, the more hospitalizations. The more people who are in the hospital, the more deaths there will be.

It is very important that people do not relax their vigilance until the vaccine has achieved herd immunity. According to my timescale, it will take two or three years to roll out this program to all the countries of the world. It is a very difficult message.