A health worker administers a dose of the CoronaVac Covid-19 vaccine, developed by Chinas Sinovac Ltd., to an Airports of Thailand Pcl employee at a vaccination site set up at a near-empty Suvarnabhumi Airport in Bangkok, Thailand, on Friday, April 30, 2021. Thailand is reworking its vaccine strategy as a month-long soft lockdown to contain its worst wave of Covid-19 infections deepens an economic crisis and risks plans for reopening the crucial tourism industry. - Bloomberg BANGKOK, April 28 (Xinhua): Thailand's manufacturing production index (MPI), a gauge of manufacturing activity, rose for the first time in 23 months to 107.73 in March, the highest level in two years, official data has showed.