NIGERIA will bar passengers who fail to follow the country's COVID-19 protocol from flying for six months, according to an official. Passengers returning to Nigeria are currently required to test for COVID-19 both before they board return flights and seven days after they arrive. They also must pay for the tests in advance. Dr Sani Aliyu, coordinator of Nigeria's COVID-19 task force, said 60% of those who pre-paid for tests had failed to show up for them. "These passengers will not be allowed to travel for a period of six months," Aliyu said. "We hope that we do not need…