Q&A: Influenza and COVID-19 - similarities and differences
How are COVID-19 and influenza viruses similar?
Firstly, COVID-19 and influenza viruses have a similar disease presentation. That is, they both cause respiratory disease, which presents as a wide range of illnesses from asymptomatic or mild through to severe disease and death.
How are COVID-19 and influenza viruses different?
The reproductive number – the number of secondary infections generated from one infected individual – is understood to be between 2 and 2.5 for COVID-19 virus, higher than for influenza. However, estimates for both COVID-19 and influenza viruses are very context and time-specific, making direct comparisons more difficult.
DAY 1 TO DAY 2
The beginning symptoms are similar to the common cold with a mild sore throat and neither having a fever nor feeling tired. Patients can still consume food and drink as usual.
DAY 3
The patient's throats start to feel a bit painful. Body temperature reads at around 36.5° celsius
DAY 4
Throat pain becomes more serious. Other symptoms like feeling weak and joint pain start to manifest.
DAY 5 TO 6
Mild fever starts. The patients show a temperature reading above 37.2° celsius. The second most common symptom, dry cough, also appears. Dyspnea or breathing difficulty may occur occasionally. Most patients in this stage are easily feeling tired.
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