Background
infection, coronavirus disease 2019
INFECTION, DISEASE, CORONAVIRUS DISEASE 2019, LUTZ
Edited by: Piero Pileri, Toscana Life Sciences, ItalyReviewed by: Mario U. Mondelli, University of Pavia, Italy; Elizabeth De Gaspari, Adolfo Lutz Institute, Brazil; Giuseppe Andrea Sautto, Lerner Research Institute, United States†These authors have contributed equally to this workThis article was submitted to Vaccines and Molecular Therapeutics, a section of the journal Frontiers in ImmunologyBreakthrough severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in coronavirus disease 2019 (COVID-19) vaccinees typically produces milder disease than infection in unvaccinated individuals.