Not all SARS-CoV-2 infections are created equal. We have learned this through multiple virus waves are taking their toll on the world’s population. Improving vaccines and new anti-viral therapies that target distinct viral molecules (antigens) and the changes they undergo over time have helped to soften this blow. However, to control the disease even better and everywhere, we have to be able to assess whether and with which viral variant individuals have been infected, what kind of protective immunity they possess, and how they respond to vaccinations and therapies.
