Over 40 million doctors, nurses and other health professionals from 90 countries urged G20 leaders to put public health at the centre of their economic recovery packages to help avoid future crises and make the world more resilient to them.    In a letter to G20 leaders, they recommended prioritising investments in public health, clean air, clean water and a stable climate in the economic stimulus packages currently under consideration.   “Such investments would reduce air pollution and climate-warming emissions, which damage human health, build greater resilience to future pandemics, and simultaneously create more sustainable jobs,” the letter says, according to a press release.   Covid-19 pandemic has exposed doctors, nurses and other health professionals to death, disease and mental distress at levels not seen in decades.