Table 1.

Symptomatic comparison of COVID-19, SARS, MERS and Common.

Diseases	Symptoms	Onset of disease	Incubation period	Recovery	Transmission of disease	Complications if any	Treatments if available
Novel Coronavirus (COVID-19)	Fever Cough Shortness of Breath Fatigue	Sudden	2–14 days after exposure	2–8 weeks	Human to Human	Acute pneumonia, septic shock, respiratory failure in adverse condition.	No vaccines available, only symptoms can be treated.
Severe Acute Respiratory Syndrome (SARS)	Fever Dry Cough Headache Difficulty in breathing Muscle aches Loss of appetite Diarrhoea	Sudden	2–7 days after exposure	5–6 weeks	Human to Human	Heart, Liver and Respiratory failure in adverse condition.	Breathing ventilator to deliver oxygen. Pneumonia treating antibiotics Antiviral medicines Steroids to reduce lung swelling
Middle East Respiratory Syndrome (MERS)	Fever Chills Diarrhoea Nausea Vomiting Congestion Sneezing Sore throat	Sudden	5–6 days after exposure	6–7 weeks	Human to Human	Acute pneumonia Kidney failure in adverse condition.	Treatment only for symptoms such as Fluids replacement Oxygen therapy.
Common flu	Runny or Stuffy nose Sneezing Sore throat Mild Headache Low grade fever	Gradual	2–3 days after exposure	7–10 days	Human to Human	Extremely rare or None	Symptoms can be treated by medication.

This table represents the parallel investigation of Severe Acute Respiratory Syndrome (SARS), Middle East Respiratory Syndrome (MERS), Novel Coronavirus (COVID-19) and Common Flu with their Symptoms, Onset of Disease, Incubation Period, Recovery, Transmission of Disease, Complications and available treatments.