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In January 2021 scientists reported that reductions in air pollution due to worldwide COVID-19 lockdowns in 2020 were larger than previously estimated. It was concluded that, because of the impact of the COVID-19 pandemic on the climate during that year, a slight warming of Earth's climate during the year was seen instead of a slight cooling.
In theoretical physics, negative mass is a hypothetical type of exotic matter whose mass is of opposite sign to the mass of normal matter, e.g. −1 kg. [1] [2] Such matter would violate one or more energy conditions and exhibit strange properties such as the oppositely oriented acceleration for an applied force orientation.
These effects have persisted as US deaths due to COVID-19 in 2021 exceeded those in 2020. [362] In the United States, COVID-19 vaccines became available under emergency use in December 2020, beginning the national vaccination programme. The first COVID-19 vaccine was officially approved by the Food and Drug Administration on 23 August 2021. [363]
The COVID-19 pandemic has had many impacts on global health beyond those caused by the COVID-19 disease itself. It has led to a reduction in hospital visits for other reasons. There have been 38 per cent fewer hospital visits for heart attack symptoms in the United States and 40 per cent fewer in Spain. [1]
SARS-CoV-2 is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV, and the original SARS-CoV. [105] Like the SARS-related coronavirus implicated in the 2003 SARS outbreak, SARS‑CoV‑2 is a member of the subgenus Sarbecovirus (beta-CoV lineage B). [106] [107] Coronaviruses undergo frequent recombination. [108]
Countries where there were suspensions of Catholic Masses with the presence of the people during the COVID-19 pandemics, at regional level (in red) or national level (in burgundy). In March 2020, all public Masses were suspended in Vatican City and Italy due to the COVID-19 pandemic.
On 11 January 2021, it was announced that Indonesian–Japanese idol group JKT48 will forcibly mass-remove 26 of its 59 remaining members due to crisis caused by the COVID-19 pandemic and government-imposed large-scale social restrictions. [105] They will officially leave the group mid-March 2021. [106]
Chaos and the negative effects of the COVID-19 pandemic may have made a catastrophic future seem less remote and action to prevent it more necessary. However, it may also have the opposite effect by having minds focus on the more immediate threat of the pandemic rather than the climate crisis or the prevention of other disasters.