I disagree with that article. I think in the cold / flu season, and this year is really bad, hand towels need to be changed every other day if not more often, and bath towels every other use. I wash all towels, wash cloths, hand towels, and kitchen towels in hot water and chlorine bleach, short to normal cycle to minimize cloth damage (I have a SQ top load). I usually soak them for a while then resume the cycle. Most times everything is hung out to dry on a sunny day, cedar and mold pollen be damned.
Cannot stomach or imagine washing towels and sheets only in warm or cold water. After visiting the relatives this year I didn't appreciate towels that smelled like vomit after they got wet. I lived through it, graciously too, but from now on I'm taking my own towels when I go visiting. (My mother would roll over in her grave if she only knew.) LOL.