1. Evaluation of Waning of SARS-CoV-2 Vaccine–Induced Immunity
2. Long COVID: major findings, mechanisms and recommendations
3. COVID. Germany ends obligatory masks for public transit. Deutsche Welle https://www.dw.com/en/covid-germany-ends-obligatory-masks-for-public-transit/a-64587973 (2023).
4. O’Leary N. Belgium imposes ventilation rules for businesses to combat new Covid surge. Irish Times https://www.irishtimes.com/news/world/europe/belgium-imposes-ventilation-rules-for-businesses-to-combat-new-covid-surge-1.4612101 (2021).
5. Covid-19: An urgent call for global “vaccines-plus” action