The roll-out of coronavirus vaccines in many countries will not provide herd immunity from the global pandemic this year, several health experts said on Monday, citing limited access for poor countries, community trust problems and potential virus mutations. “We won’t get back to normal quickly,” Dale Fisher, chairman of the World Health Organization’s (WHO) Outbreak Alert and Response Network, told the Reuters Next conference. “We know we need to get to herd immunity and we need that in a majority of countries, so we are not going to see that in 2021,” Fisher said. “There might be some countries that might achieve it but even then that will not create […]