If your son is not experiencing a fever, there is no need to worry at this moment. It is recommended to focus on nasal hygiene techniques to help reduce mucus in his throat. If his symptoms change or worsen, it is advised to follow current guidelines for COVID-19, such as checking symptoms, calling the appropriate hotline for advice, and practicing good hygiene measures to prevent spreading the virus. Remember to stay calm, as serious complications of the coronavirus are rare, and the main goal is to avoid infecting others and control the pandemic.