World may be ‘post-herd immunity’ to measles, top US scientist says

As infections pummel communities in the US, Mexico and Canada, fear of the most contagious human disease' grows

A leading immunologist warned of a post-herd-immunity world", as measles outbreaks affect communities with low vaccination rates in the American south-west, Mexico and Canada.

The US is enduring the largest measles outbreak in a quarter-century. Centered in west Texas, the measles outbreak has killed two unvaccinated children and one adult and spread to neighboring states including New Mexico and Oklahoma.