Sivo , D., Russo , A., Maselli , C., Balzano , A., Carelli , D., Durante , P., … Delle Donne , A. (2021). Effects of regular testing as a sort of Covid-19 filter, by identifying, isolating and thus filtering out currently infected persons, using antigenic tests among healthcare workers in three hospitals in the South of Italy. Journal of Advanced Health Care, 3(3). https://doi.org/10.36017/jahc202133179