1. COVID-19 Among Workers in Meat and Poultry Processing Facilities ― 19 States, April 2020
2. Van Der See B, Levitt T, McSweeney E. Chaotic and crazy: meat plants around the world struggle with virus outbreaks. Guardian 2020 May 11. https://www.theguardian.com/environment/2020/may/11/chaotic-and-crazy-meat-plants-around-the-world-struggle-with-virus-outbreaks
3. Reuben A. Coronavirus: Why have there been so many outbreaks in meat processing plants? BBC News 2020 Jun 23. https://www.bbc.co.uk/news/53137613
4. Robert Koch-Institut. Täglicher Lagebericht des RKI zur Coronavirus-Krankheit-2019 (COVID-19), 28 Jun 2020. https://www.rki.de/DE/Content/InfAZ/N/Neuartiges_Coronavirus/Situationsberichte/2020-06-28-de.pdf?__blob=publicationFile
5. Agostino S. Número de casos de Covid já chega aos 26 na Sonae e aos 129 na Avipronto. Valor Local 2020 May 17. https://www.jornalvalorlocal.com/nuacutemero-de-casos-de-covid-jaacute-chega-aos-26-na-sonae-e-aos-129-na-avipronto.html