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But, the strong uptrend of the smart speaker sector has begun to arouse security concerns. A report from Trend Micro Inc, a global cloud security firm, said some smart speakers can leak data and information.

But some investors and economists expressed concern about the risk of overtightening given slower growth prospects next year.

By comparison, a then-record 12.5 million influenza vaccines were made available in 2019.

But the challenge also presents many opportunities, he said. Canon expects to boost its Asia revenue to billion by 2020, riding the booming tourism industry as well as growing demand from consumer segments like women, senior citizens and tourists.

But the approach was rejected by the LSE. David Schwimmer, LSE's chief executive, wrote in a letter that the exchange preferred Shanghai over Hong Kong as a long-term partner to access the Chinese markets.