A good practice is keeping flies off food by COVERING the dish to PROTECT the contents from flies laying eggs and any other「array of emissions with feces.」In addition to regurgitation, a fly might defecate as it explores the new surface:「What the fly transfers onto your food depends on its travels before landing on your lunch. The insect might have visited some unsavory spots, such as dumpsters and dog [fecal matter] in a more urban area, or farms and animal carcasses in a more rural area. The fly could have also ingested bacteria or carried it along on its feet, wings, or mouth. In fact, Nayduch and her colleagues have identified more than 200 pathogens that have been found in adult house flies. A range of factors, such as the fly's travels, determine what exactly happens when it lands on your food. The outcome depends on the species of bacteria the fly harbors, the amount of bacteria, whether the bacteria is on or inside the fly, proximity to the source of the bacteria, and even the sex of the fly, Nayduch says.
The Worst That Will Happen: The worst case scenario would occur if the fly was harboring harmful bacteria and that bacteria had time to grow in your food. For example, if the fly explored a garbage can or animal droppings, and then spent a significant amount of time in your sandwich or in the serving dish. Maybe you were distracted and didn't see the fly land, or you decided to go back for seconds after the food was sitting out for a few hours. In cases like that, you could contract an infection from salmonella or E. coli, says William Kern, an entomologist at the University of Florida. This would lead to a very unpleasant few days, but the illness wouldn't be life-threatening for healthy adults.」
[ https://www.vice.com/en/article/evk4vj/what-happens-when-a-fly-lands-on-your-food 2023-05-18 ]
Other interpretations are left to your imagination, such as CONCEAL, HIDE, PROTECT (your reputation?) by using「arrayed netting with sheep.」See the similar and related glyphs for details.「Emissions of the king in netting array, on tray」need no explanation as CONCEAL, HIDE, PROTECT the king's reputation.

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: lid; top; cover; canopy; to cover; to conceal; to build
Japanese EDRDG: cover, lid, flap
Unihan extended: cover, hide, protect