We present below some fatāwā (legal verdicts) from the scholars of the daʿwah to Tawḥīd in the Arabian peninsula, from the early 19th century, on smallpox inoculations.

The Caliph ʿUmar would seek to push out and repel any notion or idea of contagion from his mind, in order to gain certainty in the statement of the Prophet [sas] in negation of the superstition of contagion.