simple kwl chart about covid 19?:((
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HEALTH COVID-19
Understanding the Coronavirus Pandemic, in 5 Charts
By now, it has become clear that COVID-19 is not “just the flu.” Without a vaccine or treatment available, the novel coronavirus has spread through communities around the world virtually unchecked, prompting entire cities and countries to go into lockdown—their best defense against the fast-moving illness.
COVID-19 and the flu do share some symptoms: cough, fever, weakness, body aches. But, as of March 17, COVID-19 has killed about 4% of the approximately 200,000 people who have been diagnosed with the illness around the world. The flu, by contrast, infects millions of people each year, but usually kills less than 0.1% of them.
COVID-19 demands to be taken seriously—but the death rate associated with it is not set in stone, and may well come out to be far lower than 4%.
Since the COVID-19 outbreak began to pick up steam in Wuhan, China in January, experts have been scrambling to get a handle on the disease and the way it behaves. But they have also warned that estimates are not exact, and that numbers are likely to shift over time. One key reason: people with milder versions of the illness are underrepresented in official case counts, since they may not be sick enough to seek medical attention or realize they have anything more than a cold. Some people, research now suggests, may get infected and become contagious without showing any symptoms at all.
That means the total number of reported cases is very likely an underestimate—and by not counting many mild or asymptomatic cases, we’re likely overestimating the disease’s overall case fatality rate. The same problem likely applies to other diseases—such as the flu, which can vary in terms of severity from year to year—but it’s especially pronounced in an unprecedented outbreak with limited testing capacity.
Looking at data from countries with robust testing systems does support the idea that the disease’s case fatality rate may be lower than 4%. Countries that have tested many people are generally reporting lower case fatality rates than those that have tested fewer, and focused on severe cases. This suggests that when testing networks are broadened to catch people with less serious illnesses, and case counts then reflect this range of severity, death rates go down.
The case fatality rate in South Korea, where 5,597 tests had been administered per million residents by March 17, comes out to 0.97%, for example. In Japan, where only 130 tests had been administered per million residents, the case fatality rate is 3.3%.