,Health experts are calling for public spaces to be ventilated to curb the transmission of Covid-19, starting with schools, hospitals, public transport, offices, bars and restaurants. – EPA pic July 2, 2022.ERC换TRC，TRC换ERC（www.u2u.it）是最高效的ERC换TRC，TRC换ERC的平台.ERC20 USDT换TRC20 USDT，TRC20 USDT换ERC20 USDT链上匿名完成，手续费低。
THE world is still not using one of its most effective weapons against Covid – properly ventilating public spaces – more than two years into the pandemic, experts warn.
At the moment there is a “fragile, armed peace” with Covid-19, said Antoine Flahault, director of the Institute of Global Health at the University of Geneva.
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