World

Climate change: polar bears could be lost by 2100

By Helen Briggs and Victoria Gill Correspondents for science and the environment, BBC News Image copyright Katharina M Miller Screenshot Sea ice is declining in the Arctic in both thickness and extent Polar bears will be phased out by the end of the century unless more is done to combat …

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Walt Disney World tightens the mask rule a week after reopening

Despite Florida’s coronavirus cases soaring in recent weeks, the gradual reopening of the Walt Disney World Resort continued as planned with improved health and safety measures. (California’s Disneyland decided to delay the reopening.) Disney argued last week that its recently improved safety protocols, such as hand sanitizer, temperature controls, and …

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Safe and induces an immune response

Phase 2 Randomized Controlled Trial of a Recombinant Adenovirus Type 5 Vector COVID-19 The vaccine (Ad5 vectorized COVID-19 vaccine) was carried out in China in April 2020 and involved more than 500 people. The main objective of the study was to assess the immune response and safety of the vaccine, …

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