mask

For smaller omnivorous and carnivorous mammals such as masked palm civets or elephant shrews, nectar can act as a high-calorie supplement.

Despite having N95 masks, they could endure work for only about two hours before they were sent home because of worsening air quality.

Zuraya Hadad instinctively winces as we watch a video of the incident in which her ribs were broken by a masked man wielding a large stick.

Unlike many saboteurs, the 46-year-old does not wear a mask - and was happy to be interviewed on camera.

"Our innovative approach significantly reduces the masking effects of highly abundant plasma proteins, which often hinder the detection of critical biomarkers in human plasma," Mahmoudi explained.