Fenton, L., Gribben, C., Caldwell, D., Colville, S., Bishop, J., Reid, M., White, J., Campbell, M., Hutchinson, S., Robertson, C., Colhoun, H.M., Wood, R., McKeigue, P.M., McAllister, D.A., 2021. Risk of hospital admission with covid-19 among teachers compared with healthcare workers and other adults of working age in Scotland, March 2020 to July 2021: population based case-control study 374.. https://doi.org/10.1136/bmj.n2060