@article{article, title  = {{COVID-19 due to the B.1.617.2 (Delta) variant compared to B.1.1.7 (Alpha) variant of SARS-CoV-2: a prospective observational cohort study}},

 publisher = {{Springer Science and Business Media LLC}},

 url = {{https://doi.org/10.1038/s41598-022-14016-0 }},

 year = {{2022}},

 month = {{6}},

 author = {{Kläser K and Molteni E and Graham M and Canas LS and Österdahl MF and Antonelli M and Chen L and Deng J and Murray B and Kerfoot E and Wolf J et al}},

 doi = {{10.1038/s41598-022-14016-0}},

 volume = {{12}},

 journal = {{Scientific Reports}},

 issue = {{1}},

 note = {{Accessed on 2025/09/16}}}