It is very common to experience a lingering dry cough and throat irritation after a feverish illness. This is often due to post-viral airway hyperresponsiveness, where your throat tissues remain sensitive and inflamed even after the virus is gone. Another common cause is post-nasal drip, where mucus trickles down the back of your throat, triggering a cough. To help soothe this, you can try staying well-hydrated, using a humidifier, or trying honey. However, if your cough persists beyond three weeks, or if you develop shortness of breath, please consult a healthcare provider for an evaluation.