miasma (μίασμα) Pollution
Apollo was the god of katharsis, of purification especially after homicide and the miasma, of pollution and the spilling of blood].
References
Miasma (Greek mythology) - Wikipedia
Apophrades - Oxford Research Encyclopedias https://bit.ly/3DpN8uV
The ‘moonless’ times at the end of the month. Because pollution was thought to be abroad, temples were closed and major undertakings were avoided.
Fabian Meinel (9 March 2015). Pollution and Crisis in Greek Tragedy. Cambridge University Press. ISBN 978-1-107-04446-3.
Pollution and crisis in Greek tragedy by Fabian Meinel - Academia.edu
Blickman, Daniel R. “The Myth of Ixion and Pollution for Homicide in Archaic Greece.” The Classical Journal, vol. 81, no. 3, 1986, pp. 193–208. JSTOR, www.jstor.org/stable/3297229.
Visser, Margaret. “Vengeance and Pollution in Classical Athens.” Journal of the History of Ideas, vol. 45, no. 2, 1984, pp. 193–206. JSTOR, www.jstor.org/stable/2709287.
Robert Parker (1996). Miasma: Pollution and Purification in Early Greek Religion. Clarendon Press. ISBN 978-0-19-814742-8.
Van der Eijk, Philip, editor. “HIPPOCRATIC MEDICINE AND GREEK TRAGEDY.” Greek Medicine from Hippocrates to Galen: Selected Papers, by Jacques Jouanna and Neil Allies, Brill, LEIDEN; BOSTON, 2012, pp. 55–80. JSTOR, www.jstor.org/stable/10.1163/j.ctt1w76vxr.9.
Dyer, R. R. “The Evidence for Apolline Purification Rituals at Delphi and Athens.” The Journal of Hellenic Studies, vol. 89, 1969, pp. 38–56. JSTOR, www.jstor.org/stable/627464.
PLATO’S PHILOSOPHICAL DEFINITION OF CATHARSIS
https://ojs.tnkul.pl/index.php/rh/article/download/4826/4720/
Miasma and katharsis Research Papers - Academia.edu
HellenicGods.org - GLOSSARY OF MIASMA AND PURIFICATION
Katharsis & Miasma - Hellenic Faith