Matthew 17:20 NIV
...”Truly I tell you, if you have faith as small as a mustard seed, you can say to this mountain, ‘Move from here to there,’ and it will move. Nothing will be impossible for you.”
The catch is... the strength of your faith.
If these peoples’ faith is strong enough AND it is God’s will, they WILL be spared disease.
Myself, I like to think of my faith as being strong, but apparently not as strong as those people.
I was not talking about the father that went to the dance.
Total disregard for the health of everyone at the dance.
SELFISH, a very human trait.