However, after an intensive research work, our research group has discovered that we can induce trained immunity against COVID-19. The work has been published in the Frontiers in Immunology journal, and it is a collaboration between the Hospital la Paz Institute for health research (IdiPAZ), the National Center for Cardiovascular Research (CNIC) and the National Center for Biotechnology (CNB).
If you want to know more: https://www.empireo.es/entrenarnos-contra-la-covid-19/
https://www.larazon.es/sociedad/20211118/3m4ks6atonhproa6d2s5zmzk6y.html
https://www.frontiersin.org/articles/10.3389/fimmu.2021.748103/full