Bangladesh Ambassador to the United States M. Shahidul Islam has called upon the US vaccine producing companies to exercise more openness and transparency in commercial export of vaccines to developing countries.    The Ambassador expressed hope to remain engaged with the US government and the private sector to secure adequate vaccines for the people of Bangladesh.  While appreciating US donation of vaccines to developing countries, the envoy opined that commercial procurement of vaccines will play a more important role in vaccinating a populous country like Bangladesh. He was addressing a virtual town-hall discussion on Tuesday which was participated by officials of the U.S. Chamber of Commerce, diplomats from the Embassy of Bangladesh in Washington DC, and representatives from various companies such as Uber, Chevron, General Electric, MetLife, Abbott, Boeing, PepsiCo, Google, Facebook.  President of the U.S.- Bangladesh Business Council Nisha Biswal delivered a welcome speech at the event.   Also read: Biotech's Covid vaccine to get conditional approval for human trials: BMRC