Doctor Richard Dang (R), Assistant professor USC School of Pharmacy, administers a Covid-19 vaccine to Ashley Van Dyke as mass-vaccination of healthcare workers takes place at Dodger Stadium on January 15, 2021 in Los Angeles, California.Irfan Khan | AFP | Getty ImagesPeople who get vaccinated against Covid-19 at Dodger Stadium leave with inoculation against the virus, a band-aid on their arm, and a CDC card with handwritten details such as when it was provided and which type of vaccine it was.The CDC card is a tradition that goes back to the 1880s, when paper cards were first used to let students return …
