ANASTASIA MOLONEY ROLLING out COVID-19 vaccines to billions of people across the world means managing the most complex supply chains the world has ever seen. But valuable lessons are there to be learned including from India where hundreds of millions of children are vaccinated against diseases every year and Sierra Leone where people received Ebola shots after the deadly disease outbreak in 2014. We asked public health experts and a community health worker who survived Ebola how they ensure vaccines reach those most in need. INCLUDE WOMEN Globally about 70% of health workers are female, and women are often the…