Why were other countries worried about Chernobyl?

Other countries were worried about the Chernobyl disaster due to the release of large amounts of radioactive materials into the atmosphere, which posed a significant health risk beyond Ukraine's borders. The wind carried radioactive particles across Europe, leading to concerns about contamination of food, water, and air. Additionally, the event highlighted vulnerabilities in nuclear safety protocols worldwide, raising fears about the potential for similar accidents in other countries with nuclear power plants. This situation prompted international discussions on nuclear safety and emergency preparedness.