While test kits and masks are in short supply, researchers have come up with a stopgap solution: 3-D printing them. Our reporter Sara Castellanos will join us to explain. Have a work-from-home tech question for Senior Personal Tech Columnist Joanna Stern, or want to share your own experience? Leave her a message at (314) 635-0388 or email her at joanna.stern@wsj.com. You may be featured on one of our podcasts. Kateri Jochum hosts. Learn more about your ad choices. Visit megaphone.fm/adchoices