Symptoms include high fever, headache, vomiting, fussiness, and loss of appetite.
[caringforkids.cps.ca]
Symptoms typically come on quickly and may include difficulty breathing, shortness of breath, chest pain, high fever, excessive sweating and shaking chills, and coughing.
[lung.org]
Initially a viral illness is followed by an acute onset of high fever, rigors, productive cough, chest pain, dyspnea, tachypnea, tachycardia, excess perspiration, general
[symptoma.com]