The Covid-19 pandemic has increased the pressure on our health systems, clearly revealing how much investment in resources and planning is still needed to develop health systems that are resilient, equitable, efficient, and sustainable. The pandemic highlights the necessity to allocate funds towards prevention, training, and communication activities: greater public attention towards health risks can help promote virtuous changes, including sharing contents and information that act as a guide for the population. This policy brief identifies five pillars on which governments should invest to increase the preparedness and sustainability of health systems. It describes actions that the G7 should take to support countries and ensure harmonized policies, coordination, and exchange of information to avoid repeating previous mistakes with future health threats.