COVID-19 or non-COVID viral pneumonia: How to differentiate based on the radiologic findings?

Table 1 Clinical features of coronavirus disease 2019 and influenza A[11,18,20-27]

	COVID-19	H1N1
Fever	++++	++++
Cough	+++	++++
Myalgia	++	++
Fatigue	++	++
Sputum	++	++
Rhinorrhea	+	++
Dyspnea	++	++
Headache	++	+
Nausea & Vomit	+	+
Chest pain	+	+
Sore throat	+	++
Diarrhea	+	+
Hemoptysis	+	+
Skin lesions	Erythematous rash, urticarial, chickenpox-like vesicles (+)[28]	Maculopapular (+)[29]
Conjunctivitis	+[30]	+[31]
Other eyes lesions	-	Sub conjunctival hemorrhage, uveal affection, retinopathy, and optic neuritis (+)[32]
Anosmia, hyposmia	+/++[33,34]	+[35]
Ageusia, dysgeusia (loss of taste)	+[34]	+[36]
Transmission interval	5-6 d	3 d
Reproductive number	2.2	1.3-1.7

+: Rare; ++: Uncommon; +++: Common; ++++: Very common; COVID-2019: Coronavirus disease 2019; H1N1: Influenza A.