* Graphic: World FX rates in 2020 tmsnrt.rs/2RBWI5E * Dollar falls as traders eye next steps in coronavirus fight * New Zealand dollar hits more than one-year high after RBNZ * Rising U.S. coronavirus cases also a concern By Stanley White TOKYO, Nov 11 (Reuters) - The dollar fell on Wednesday as optimism about a potential coronavirus vaccine was offset by worries about how the drug will be delivered and by a surge of new infections in the United States. The New Zealand dollar recovered from an early dip to hit its strongest level in more than a year as traders scaled back bets that the central bank would move to negative interest rates. Initial optimism about coronavirus vaccine testing pushed the dollar up against the safe-harbour yen and the Swiss franc, but this momentum is starting to fade because there are still several obstacles to clear before a vaccine can be distributed. "The dollar recovery is on hold for now because, when you look at the details, there are still a lot of hurdles to clear before any vaccine is rolled out," said Junichi Ishikawa, senior foreign exchange strategist at IG Securities in Tokyo. "However, the dollar is supported by rising Treasury yields, which should help the dollar make another push higher before year"s end." The dollar fell 0.15% to 105.07 yen, pulling back from a three-week high. Against the euro, the dollar eased slightly to $1.1829. The British pound traded at $1.3273, close to a two-month high due to growing optimism that Britain and the European Union will agree a long-sought-after trade deal. Sterling, however, surrendered some of its overnight gains against the euro. Sentiment for the dollar got a boost after Pfizer Inc and BioNTech said on Monday their experimental coronavirus vaccine was 90% effective. However, the reaction across financial markets has become more tempered because there are several logistical hurdles to making the drug available, including that it has to be shipped at extremely cold temperatures. Several U.S. states on Tuesday imposed restrictions to curb the spread of the coronavirus as hospitalizations soared, highlighting the difficulty in containing the virus as winter in the Northern Hemisphere approaches. The dollar index against a basket of six major currencies fell slightly to 92.633. The onshore yuan capitalised on the dollar"s weakness and rose to 6.5926. Other Asian currencies, such as the Korean won and the Singapore dollar, also gained against the greenback. The New Zealand dollar hit $0.6868, its strongest since March 2019. The Reserve Bank of New Zealand (RBNZ) kept interest rates on hold at 0.25% and introduced a new monetary policy tool to encourage more loans by reducing borrowing costs for banks, which matched market expectations. RBNZ Governor Adrian Orr also said domestic economic activity since August has been more resilient than previously assumed, which many traders took as a sign that the chance of negative interest rates has receded. Across the Tasman Sea, the Australian dollar also rose against its U.S. counterpart. ======================================================== Currency bid prices at 12:45PM (0345 GMT) Description RIC Last U.S. Close Pct Change YTD Pct High Bid Low Bid Previous Change Session Euro/Dollar $1.1829 $1.1812 +0.15% +5.52% +1.1833 +1.1812 Dollar/Yen 105.0750 105.2650 -0.15% -3.23% +105.2850 +105.0200 Euro/Yen 124.29 124.36 -0.06% +1.92% +124.4600 +124.1800 Dollar/Swiss 0.9142 0.9151 -0.10% -5.53% +0.9153 +0.9139 Sterling/Dollar 1.3273 1.3276 -0.03% +0.07% +1.3279 +1.3254 Dollar/Canadian 1.3022 1.3036 -0.13% +0.22% +1.3042 +1.3010 Aussie/Dollar 0.7311 0.7287 +0.34% +4.20% +0.7318 +0.7277 NZ 0.6887 0.6832 +0.83% +2.38% +0.6903 +0.6809 Dollar/Dollar All spots Tokyo spots Europe spots Volatilities Tokyo Forex market info from BOJ (Reporting by Stanley White; editing by Richard Pullin and Kim