Organisation mondiale de la santé

The provided news articles do not mention the Organisation mondiale de la santé (World Health Organization - WHO). Article 1 discusses the link between cancer and factors like pesticides and pollution in food. It highlights the challenge of quantifying the threat posed by these factors. Article 2 focuses on the situation in Iran following a ceasefire negotiated with the United States, detailing the impact of the conflict and the country's current stance. Therefore, it is impossible to provide a summary of the WHO based on the given content.