by Cat Barton and Claire Lee Agence France Presse SEOUL, South Korea (AFP) — North Korea confirmed its first Covid-19 death on Friday, saying fever was spreading “explosively” nationwide and tens of thousands of people were being isolated after falling sick. The insular country only reported its first Covid cases Thursday, saying it was moving into “maximum emergency epidemic prevention system” after sick patients in the capital Pyongyang tested positive for the Omicron variant. […]