By Manas Mishra (Reuters) -The world has never been in a better position to end the COVID-19 pandemic, the head of the World Health Organization said on Wednesday, urging nations to keep up their efforts against the virus that has killed over six million people. “We are not there yet. But the end is in sight,” WHO Director-General Tedros Adhanom Ghebreyesus told reporters at a virtual press conference. The comment was the most optimistic from the UN agency since it declared COVID-19 an international emergency and started describing the virus as a pandemic in March 2020. The virus, which emerge…