Among Italian immigrants malocchio or evil eye was something to be feared. Malocchio was caused by the bad thoughts of other people especially in respect to children . A child feeling ill was very possibly the result of someone having cast an evil eye upon the child. If one suspected that this was being done, the first line of defense was to point an index finger and small finger ( a. k. a. giving the horns) unobtrusively at the "looker" . If this did not ward off the malocchio it was time for more drastic action. Not a visit to an urgent care center but a visit to someone "possessing the power" to expunge the malocchio.. This individual, usually a female, would place a few drops of olive oil on the forehead of the infected person and incessantly rub the oil in the form of a cross while mumbling some unintelligible prayer. If she yawned a lot during the incantation the effects of the malocchio were being driven out. The poor child was usually scared out of its wits and after the treatment would announce a cure rather than submit to more incantations. The cost? Very reasonable - just a few coins.
(How did one acquire the powers to cure ailments due to malocchio? On the job training. My sister suffered frequently from malocchio. Since she was getting very familiar with the whole procedure of removing malocchio she was considered a prime candidate to learn the powers. As far as I know this never happened, although sometimes I wonder.)