Where's o_e_l_e_o when you need him?
The short answer is "We don't really know yet."
The slightly longer answer is a bit more complicated. We have few data at the moment, and the situation is changing rapidly.
The R
0 value is essentially how many secondary cases you would expect to be created by each infected person. The
most recent data I've seen puts this at 4.08. So each person is expected to infect 4 other people. This is high. Seasonal flu has an R
0 value around 1.3, and flu pandemics have an R
0 value around 1.5-2. SARS had a similar value, of between 3 and 5, but as the graphic shared by MinerHQ above shows, despite similar R
0 values, 2019-nCoV is spreading exponentially faster.
Mortality rate is currently estimated at between 2 and 6%. Again, this number is constantly subject to change as the situation develops. For comparison, SARS had a death rate of 10%, but seasonal flu has a rate of <0.01%, and H1N1 or other more serious flu strains are around 0.02%.
So we have a virus with the potential to spread rapidly and the potential to cause between 1 in 20 and 1 in 50 to die from it (based on current data). We also know this virus can spread from person to person. The first confirmed cases in Germany was
transmitted from someone who has a "brief and nonspecific" illness. We also know that you can be infected and infect others
while being completely asymptomatic.Quarantines on Wuhan will achieve very little at this point, as local epidemics of the disease have
already been established in multiple Chinese cities, including some major transport hubs such as Beijing. These local epidemics are likely lagging 2 weeks behind that of Wuhan, and similarly, spread from there to other major cities around the world a further 2 weeks behind that. Around 5 million people left Wuhan prior the quarantine going to effect, due to Chinese New Year celebrations. China has something like 4 times as many air passengers today as it did during the 2003 SARS outbreak. It is likely there are thousands more cases currently undetected, and it is likely many more countries have cases than we currently know about. All in all, this certainly has the
potential to become a global pandemic, which is why it has been declared a global emergency by the World Health Organization, the United States, and a number of other countries.
Current data suggest that it is a fairly stable virus, meaning it doesn't mutate a lot. This is a good thing for two reasons. Firstly, it's less likely to mutate in to something even more lethal or contagious, and second, it makes it easier for researchers to develop a vaccine. Vaccine development is already underway, but it's going to be months before it is ready for phase 1 trials, and up to a year before ready for general use.
There are some reports starting to emerge that various antiviral drugs already on the market may be effective, but these reports are very early and currently of low quality. The global response to this has been a lot faster than previous potential pandemics though, in terms of genome sequencing, quarantining individuals, public health measures, and so forth. It's simply too early to tell which was this is going to go.
For anyone who wants to keep up to date, there's a great visualization tool here:
https://gisanddata.maps.arcgis.com/apps/opsdashboard/index.html#/bda7594740fd40299423467b48e9ecf6. The WHO Situation Reports are also a good resource:
https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports.
Now, in terms of how this affects to Dow Jones. Airlines are suspending all flights to China, which is a huge portion of their revenue. China is the second largest oil market in the world. So much manufacturing takes place in China. We've seen shares of related companies - Delta, United, Chevron, Exxon, Apple - all take a big hit. Chinese markets are still closed from their New Year celebrations, and won't open again til Monday. I'd expect another dip then. But damn it Jim, I'm a doctor, not an economist.