China's ban on group tours to help contain the spreading virus that has left 170 people dead, will take a toll on Thailand's tourism industry, a key driver of growth.
China is Thailand's biggest source of foreign tourists, with 11 million visitors last year making up 28% of the total. The Tourism Authority of Thailand expects 2 million fewer Chinese visits this year.
China was also Thailand's top foreign investor and second-largest export market last year.
Jitipol Puksamatanan, chief markets strategist of Krung Thai Bank, said virus cases would affect tourism. The country's health authorities have detected 14 cases, the most outside of China.
"Importers are also panicking, rushing to buy dollars for fear that the baht will weaken further," he said, adding the baht might reach 32.5 per dollar in the current quarter.
The baht was at 31.11 per dollar on Thursday, at a seven-month low. It had reached a more than six-year high of 29.91 last year.
"In the short term, a weak baht is good for exports, which should not contract," said Ghanyapad Tantipipatpong, chairwoman of the Thai National Shippers' Council.
But the outbreak has compounded problems for the economy as exports already took a hit from the Sino-US trade war and investments were slowed by a delayed $104 billion fiscal budget.
The finance ministry on Wednesday slashed its 2020 growth outlook to 2.8% from 3.3%, after it estimated growth would be 2.5% in 2019, a five-year low.