By now, hopefully everyone knows about the key symptoms of coronavirus - fever about 37.8°C and new continuous cough. But there's still much confusion about how quickly symptoms develop after exposure to the virus and what you can expect if you do become infected. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a viral infection that causes COVID-19. COVID-19 is caused by infection with a new coronavirus (called SARS-CoV-2) and flu is caused by infection with influenza viruses. Research shows that the average time symptoms appear is around 4 to 5 days. There are some key differences between flu and COVID-19. COVID-19 seems to spread more easily than flu and causes more serious illnesses in some people. On the other hand, research suggests that people who are infected with SARS-CoV-2, the virus that causes COVID-19, are at their most contagious in the 24 to 48 hours before they experience symptoms. Experts say these worsening conditions are usually caused by an overreaction of the immune system after symptoms first appear. And for more on those without symptoms, check out This Is Why Some People Have Coronavirus Symptoms and Others Don't. But you would still expect there to be a few days between the time a person is exposed and infected and the time they begin actively shedding virus. The fever is often followed a few days later by a dry cough, one in which you do not cough up any phlegm, and shortness of breath. There’s an incubation period for COVID-19. If you are likely to become contagious one to two days before developing symptoms, then on average you will become contagious three to four days after being infected with the Covid-19 coronavirus. COVID-19 symptoms present itself in many ways and some of the infected people do not show any symptoms at all. Symptoms for COVID-19 can start as early as 2 days and as long as 14 days after you are exposed. This is why it is so important to wear a face mask and practice physical distancing and hand hygiene. If you test too soon after exposure, it can result in a false negative. When exposed to a COVID-19 positive person, how long does it take for symptoms to appear? Symptoms can affect the airways and … People with mild symptoms of COVID-19 can quickly become seriously ill. Continue Reading Show … In one study on false negative rates after COVID-19 exposure, researchers found that in the four days prior to symptom onset, the probability of a false negative was extremely high on day one. Symptoms of COVID-19 usually show up from two to 14 days after exposure to the coronavirus, but some people who are infected do not develop symptoms or feel ill. The first symptom of COVID-19 is usually a fever. Knows about the key symptoms of COVID-19 is usually a fever easily than flu and.. Affect the airways and … There ’ s an incubation period for COVID-19 start! 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