The sudden rise in the number of confirmed cases from the ground zero of the coronavirus outbreak Hubei province to 14,840 on Feb 12 from the 2,015 new cases reported a day earlier has stunned market participants. Impacting the risk-on sentiments, the count for new fatalities also rose to 242. The numbers surged as China started applying a new clinical method for diagnosis. In fact, the new total now includes "clinically diagnosed cases", in order to make appropriate treatment rapidly available for patients. Patients exhibiting the symptoms of Covid-19, who have not been scientifically tested or died before getting tested, come under the "clinically diagnosed cases" definition.Notably, the coronavirus eruption has already resulted in more than 1,300 deaths in China, along with the 48,206 confirmed cases in the Hubei province. In fact, 44 new cases have been confirmed on a cruise ship that has been quarantined in Japan, resulting in the total number of cases rising to 219. In addition, Citi bank has already downgraded its 2020 GDP estimate for China to 5.3% from 5.5% (read: ETF Strategies to Mark as Virus Scare May Hit Global Growth).The latest uptick has impacted the risk-on sentiments of the market participants, spurring demand for safe havens. In this regard, an economist at National Australia Bank has commented that “the unfortunate increase in number of cases in the Hubei province, which is ground zero... has affected risk-on sentiment”. Markedly, the yield on the 10-year U.S. Treasury notes shrunk 3 basis points to 1.607%. Also, the yen has surpassed 110 per dollar.It is worth noting here that the World Health Organization (WHO) has already announced that the virus poses a "grave threat" globally. Furthermore, the WHO chief, Tedros Adhanom Ghebreyesus, has commented that the coronavirus eruption could result in "more powerful consequences than any terrorist action" (read: Pick These US Small-Cap ETFs to Fight the Coronavirus Scare).ETFs to Snap UpTreasury Bonds iShares 20+ Year Treasury Bond ETF TLTHeightened global uncertainty brings this safe asset into the limelight. The Fed rate cuts this year and geopolitical concerns might drive treasury valuation. Apart from TLT, investors can consider 25+ Year Zero Coupon U.S. Treasury Index Fund ZROZ and Vanguard Extended Duration Treasury ETF EDV (read: 10 Most Heavily Traded ETFs of 2019).GoldSPDR Gold Trust ETF GLDGold is often viewed as a safe-haven asset offering protection against financial risks, and will likely perform well on heightened market volatility (read: Most Loved/Hated ETFs of the Fourth Quarter).Apart from GLD, investors can consider iShares Gold Trust IAU, another popular choice in this space.Yen Invesco Currency Shares Japanese Yen Trust FXYThe Japanese currency yen is often considered a classic safe-haven asset that has gained some strength, of late. Japan’s huge holdings of foreign assets help it gain the safe-haven status among investors. Investors can target this currency via FXY, which measures the value of yen against the greenback (see: all the Currency ETFs here).Want key ETF info delivered straight to your inbox?Zacks’ free Fund Newsletter will brief you on top news and analysis, as well as top-performing ETFs, each week. Get it free >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report iShares 20+ Year Treasury Bond ETF (TLT): ETF Research Reports SPDR Gold Shares (GLD): ETF Research Reports iShares Gold Trust (IAU): ETF Research Reports Invesco CurrencyShares Japanese Yen Trust (FXY): ETF Research Reports PIMCO 25+ Year Zero Coupon U.S. Treasury Index ETF (ZROZ): ETF Research Reports Vanguard Extended Duration Treasury ETF (EDV): ETF Research Reports To read this article on Zacks.com click here. Zacks Investment Research Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report