@article{Arnarson_2021,<br/><span class="tab"></span> title={How a school holiday led to persistent COVID-19 outbreaks in Europe},<br/><span class="tab"></span> volume={11},<br/><span class="tab"></span> ISSN={2045-2322},<br/><span class="tab"></span> url={http://dx.doi.org/10.1038/s41598-021-03927-z},<br/><span class="tab"></span> DOI={10.1038/s41598-021-03927-z},<br/><span class="tab"></span> number={1},<br/><span class="tab"></span> journal={Scientific Reports},<br/><span class="tab"></span> publisher={Springer Science and Business Media LLC},<br/><span class="tab"></span> author={Arnarson,<br/><span class="tab"></span> Björn Thor},<br/><span class="tab"></span> year={2021},<br/><span class="tab"></span> month=dec }