Amongst the ones who are partially vaccinated, i.e. have a higher risk of catching the illness and poorer outcomes, persistent coughing is a sign which should not be taken lightly. Not only can COVID variants cause quicker, moderate or severe intensity symptoms, persistent coughing can be a sign of inflammation in the respiratory tract. Lingering, persistent cough can also take time to resolve, and induce discomfort.
Do note, it may be uncommon in those who are fully vaccinated, who may experience a milder intensity of symptoms than usual.