Currently, scientists know that the coronavirus is spread out through droplets and virus particles released into the air when a contaminated person breathes, talks, chuckles, sings, coughs or sneezes. Bigger beads might be up to the ground in a few seconds, but tiny transmittable particles can remain in the air and collect in indoor places, especially where many people are gathered and there is poor ventilation. This is why mask-wearing, hand hygiene and physical distancing are important to preventing COVID-19.
The very first case of COVID-19 was reported Dec. 1, 2019, and the cause was a then-new coronavirus later on called SARS-Co, V-2. SARS-Co, V-2 may have come from in an animal and altered (mutated) so it could trigger health problem in humans. In the past, a number of infectious disease outbreaks have been traced to viruses originating in birds, pigs, bats and other animals that mutated to end up being unsafe to humans. Research continues, and more research study may reveal how and why the coronavirus progressed to cause pandemic illness.
Symptoms appear in individuals within 2 to 14 days of direct exposure to the virus. A person infected with the coronavirus is contagious to others for approximately two days prior to symptoms appear, and they stay contagious to others for 10 to 20 days, depending upon their body immune system and the intensity of their health problem.
Contagious illness expert Lisa Maragakis describes the advances in COVID-19 treatments and how understanding of COVID-19 can help in avoiding further spread of the virus.