European University at Saint Petersburg

This study aims to establish a holistic framework for continuous cancer survival surveillance in Russian regions with high-quality population-based cancer registry data. The data from the population-based cancer registries of the Northwestern regions of Russia will be used to assess net and cause-specific survival trends.

This is an observational case-control study to evaluate COVID-19 vaccine effectiveness against hospitalisation with COVID-19 related conditions in St. Petersburg, Russia. Two sets of cases and control will be retrospectively analyzed to compare vaccination proportions and other characteristics to infer vaccine effectiveness from odds ratios. The first set of cases will be extracted from the data on hospitalisation of patients with COVID-19 to First Pavlov State Medical University of Saint-Petersburg hospitals, and controls will be patients hospitalised with other conditions. The second set of cases and controls will be based on patients referred to Medical Institute named after Berezin Sergey for computed tomography. Cases will be patients with positive SARS-CoV-2 status computed tomography confirmed pneumonia or patients referred to hospitalisation, and control will be patients without pneumonia and not referred to hospitalisation.

Seroprevalence study of COVID-19 in Saint Petersburg, Russia is a regional longitudinal cohort study aiming to evaluate the spread dynamics of the COVID-19 disease in the population of Saint Petersburg. Clinically asymptomatic adults are sampled from the population using random digit dialing and tested for the presence of SARS-CoV-2-specific antibodies in the blood serum. Data collection and serial sampling of the same individuals spans four weeks and is conducted every two weeks in order to understand both the spread of the virus in the population.