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Huijghebaert S, Vanham G, Van Winckel M, Allegaert K. Does Trypsin Oral Spray (Viruprotect^®/ColdZyme^®) Protect against COVID-19 and Common Colds or Induce Mutation? Caveats in Medical Device Regulations in the European Union. International Journal of Environmental Research and Public Health. 2021; 18(10):5066. https://doi.org/10.3390/ijerph18105066

Huijghebaert, Suzy, Guido Vanham, Myriam Van Winckel, and Karel Allegaert. 2021. "Does Trypsin Oral Spray (Viruprotect^®/ColdZyme^®) Protect against COVID-19 and Common Colds or Induce Mutation? Caveats in Medical Device Regulations in the European Union" International Journal of Environmental Research and Public Health 18, no. 10: 5066. https://doi.org/10.3390/ijerph18105066

Huijghebaert, S., Vanham, G., Van Winckel, M., & Allegaert, K. (2021). Does Trypsin Oral Spray (Viruprotect^®/ColdZyme^®) Protect against COVID-19 and Common Colds or Induce Mutation? Caveats in Medical Device Regulations in the European Union. International Journal of Environmental Research and Public Health, 18(10), 5066. https://doi.org/10.3390/ijerph18105066