By Natalie Grover LONDON (Reuters) – The World Health Organization does not believe the outbreak of monkeypox in Europe and North America requires mass vaccinations as measures like good hygiene and safe sexual behaviour will help control its spread, a senior official said on Monday. In an interview with Reuters, Richard Pebody, who leads the high-threat pathogen team at WHO Europe, also said immediate supplies of vaccines are relatively limited. The primary measures to control the outbreak are contact tracing and isolation, he said. Public health authorities in Europe and North America are in…