Segulah to ask for a Refuah during leining first day of Shavuos

In the name of Rav Elyashiv zatzal it is said that on Shavuos there is a segulah to daven for a Refuah. Just like during matan Torah Hashem healed all the sick, so too on every Yom Tov of Shavuos there is a  hashpaah from har sinai. When asked when is the best time to daven for a Refuah, Rav Elyashiv replied one should do so during the krias haTorah of the Aseres hadibros which is read on the first day of Yom Tov.