If one is going to link misleading clickbait about a topic that many people may not know better about - regardless of whether it's moving the stock - it should be put in context.
And here's the context from WHO, as of a couple weeks ago, when their global estimate was 3,8%, not 3,4%:
"As of 20 February, 2,114 of the 55,924 laboratory confirmed cases have died (crude fatality ratio [CFR: 3.8%) (note: at least some of whom were identified using a case definition that included pulmonary disease). The overall CFR varies by location and intensity of transmission (i.e. 5.8% in Wuhan vs. 0.7% in other areas in China). In China, the overall CFR was higher in the early stages of the outbreak (17.3% for cases with symptom onset from 1-10 January) and has reduced over time to 0.7% for patients with symptom onset after 1 February. " [12]
Wuhan is not representative of the outbreak anywhere else in the world. And indeed, early Wuhan numbers (the majority of them) are not representative of Wuhan today. Outside of Wuhan in China 0,7%, and outside of China, the data suggests even lower rates, esp. with more recent cases. Even in Wuhan, recent cases are now 0,7% These are the sort of numbers that most countries are facing. Playing up "3,4%" just because WHO's director general happened to mention it offhand in a speech (he did not focus on it) is grossly misleading to the general public.
So if you want to mention clickbait FUD because it's having an effect on the market, sure, go ahead. But be sure to mark it as clickbait FUD.
(As an addendum, this is not the first time that this has happened. See the 2009 H1N1 pandemic, which initially overloaded the medical system in Mexico and caused a widespread freakout, but by the time it had gone global pandemic ended up no more deadly than a typical seasonal flu)