They can pose a threat to human health — yeast infections are but one example. Scientists say not enough attention is paid to their ability to develop resistance to medications that treat them.
Hezbollah, the Iran-backed Lebanese militant group, acknowledged the ceasefire, but did not say whether it would abide by it and urged people displaced by war in Lebanon to refrain from heading home.
Israel and Lebanon agreed to the 10-day ceasefire, but Israel vowed to keep its forces in southern Lebanon, saying it would attack if threatened by Hezbollah.
The historic ceasefire between Israel and Lebanon reveals a shifting role for Hezbollah in the decades-long war. NPR's Leila Fadel speaks with Maha Yahya of the Carnegie Middle East Center.