“Everybody who has traveled internationally to countries that require vaccination against malaria, diphtheria and other things has had yellow cards,” said Brian Behlendorf, executive director of Linux Foundation Public Health, a technology-focused organization helping public health authorities combat Covid-19 around the world. Its focus is helping projects, communities and companies build open-source technology. “Parents with kids in public school have had to prove their kids have been vaccinated. This is not something new.”
