persists

Whooping cough can be a pernicious disease that starts out like a cold, but then takes a severe turn with coughing that persists for weeks or months, according to the CDC.

Northern said it was still dealing with problems sparked by a timetable change in 2018 that persists in putting together timetables and "challenges facing colleagues".

But fundamentally, the crux of the problem persists.

As the high persists, the low cloud continues to feed itself by re-thickening overnight as temperatures drop and moisture condenses.

On Thursday, a UN-backed assessment warned that “the risk of famine persists across the whole Gaza Strip”, adding: “Given the recent surge in hostilities, there are growing concerns that this worst-case scenario may materialize.”