Additional file 1 of Vaccine effectiveness against referral to hospital after SARS-CoV-2 infection in St. Petersburg, Russia, during the Delta variant surge: a test-negative case-control study

Additional file 1: Figure A1. Vaccine effectiveness against referral to hospital, according to age. Figure A2. Probability of any lung injury, according to age and vaccination status. Figure A3. Vaccine effectiveness against any lung injury, according to age