As health care workers face critical shortages of personal protective equipment (PPE) to deal with the COVID-19 crisis, 3D printing companies, medical device manufacturers and other organizations are stepping up to produce face shields, ventilators and other needed supplies. For its part, Rehovot, Israel-based Stratasys Ltd. has assembled a coalition of more than 150 companies and universities to produce 3D-printed visors and clear plastic face shields. The coalition aims to produce up to 16,000 face shields per week by the end of next week.