QR codes – short for “quick response” – are commonly used in retail, logistics, and other sectors. The technology allows anyone to show proof of vaccination with a digital or printed QR code instead of a paper card, and without the need for an app. As more and more employers and businesses respond to calls by President Biden and Governor Northam to require that employees and customers be vaccinated, QR codes will help improve the consistency and security of vaccination information while protecting individual privacy.