Raw prawns or shrimp should be added closer to the end of the cooking time, simmering until fully cooked through. Alternatively, pre-cooked prawns or shrimp can be added at the end to warm them just prior to serving.
For information about safe internal cooking temperatures, please visit : https://www.canada.ca/en/health-canada/services/general-food-safety-tips/safe-internal-cooking-temperatures.html