PMC:7796344 / 18558-18784
Annnotations
LitCovid-PubTator
This is an issue returned to again and again over the years by research teams including Memish et al. (2012a,2012b,2014, 2016, 2019), considering infectious disease prevention during Umrah and Hajj pilgrimages [8,22,24,25,26].
LitCovid-sentences
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