https://www.forbes.com/sites/williamhaseltine/2021/07/20/new-studies-highlight-promising-candidates-for-second-generation-covid-19-vaccines
https://www.curevac.com/en/2021/08/16/second-generation-mrna-covid-19-vaccine-candidate-cv2cov-demonstrates-improved-immune-response-and-protection-in-preclinical-study
https://www.pmlive.com/pharma_news/curevac_to_push_ahead_with_first-_and_second-generation_covid-19_vaccines_1375211
https://pubmed.ncbi.nlm.nih.gov/34234059
https://en.wikipedia.org/wiki/Novavax_COVID-19_vaccine
https://ir.novavax.com/2021-08-05-Novavax-Announces-COVID-19-Vaccine-Booster-Data-Demonstrating-Four-Fold-Increase-in-Neutralizing-Antibody-Levels-Versus-Peak-Responses-After-Primary-Vaccination
https://www.scientificamerican.com/article/the-second-generation-covid-vaccines-are-coming
https://www.europeanpharmaceuticalreview.com/news/155439/first-patient-dosed-with-multi-variant-second-generation-covid-19-vaccine
И о том, чего ждать от вакцин 2-го и 3-го поколений:
https://wellcome.org/news/why-do-we-need-new-generation-covid-19-vaccines