Nigella sativa: A promising option for COVID-19 prevention and cure: https://onlinelibrary.wiley.com/doi/full/10.1002/ptr.6895
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"With household exposure to #COVID19, even fully vaccinated individuals with typical levels of neutralizing antibodies are at risk of infection. This data is strongly consistent with intrahousehold transmission amongst 3 vaccinated household members ..."
https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciac029/6509064