MILLIONS of children whose immunisations have been disrupted by the COVID-19 pandemic, especially in Africa, are now at risk from life-threatening diseases such as measles, polio, yellow fever and diphtheria, U.N. health agencies has warned. Gaps in vaccination coverage have already led to serious measles outbreaks in Pakistan and Yemen, the agencies said, and are likely to lead to more epidemics as more regular childhood vaccinations are missed. Compared to 2020, some progress has been made in restoring routine vaccinations disrupted by the pandemic, but more than a third of the 135 countries that responded to a World Health Organization…