![]() ![]() It caused abrupt epidemic outbreaks across South Africa, then Europe, and eventually the rest of the world by outcompeting the Delta VOC, which accounted for at least 90% of genomes sequenced globally in October 2021. On 2 November 2021, the novel SARS-CoV-2 VOC Omicron was first collected in South Africa and then spread rapidly. Even though vaccines from Pfizer, Moderna, Sinopharm, and other companies were later listed by WHO for emergency use, the emergence of new variants of concern (VOC) such as Delta drove a number of SARS-CoV-2 waves, and lockdowns were still implemented by the majority of governments from time to time. As there were no available vaccines and drugs at first, all the countries relied on non-pharmaceutical interventions (NPIs) and applied the lockdown strategy in 2020 as a critical prevention and control measure. Since December 2019, the COVID-19 outbreak suddenly and rapidly spread all over the world. All these findings indicate that the strict lockdown could curb the transmission of Omicron effectively, especially for the asymptomatic spread, and suggest that differentiated COVID-19 prevention and control measures should be adopted according to the population density and demographic composition of each community. Omicron control is more challenging in districts with higher population mobility and lockdown is more likely to decrease the number of asymptomatic carriers than the symptomatic cases. After a very strict citywide lockdown since April 1st, the average daily effective reproductive number reduced significantly, indicating that strict lockdown could slow down the spreading of Omicron. Pearson correlation was conducted to illustrate the determining factor of strict lockdown outcomes in the 16 different districts of Shanghai. Based on the daily Omicron case number from 1 March 2022 to 30 April 2022, the effective reproductive numbers in this Shanghai Omicron wave were calculated to confirm the impact of strict lockdown on Omicron transmission. In this retrospective study, we compared the strictness of government lockdown policies in Shanghai and other countries. Whether strict lockdown could effectively curb the transmission of Omicron is largely unknown. On Monday, Prime Minister Pedro Sanchez said the bloc should cease the detailed monitoring of Covid-19 cases and move to a system similar to flu monitoring.Omicron, the current SARS-CoV-2 variant of concern, is much more contagious than other previous variants. Holland's stance comes in stark contrast to fellow European Union member Spain. And that's easier to do in WA then the Netherlands which is a small densely populated nation with hundreds of million of people almost on its doorstep. But it's hard border rather than a lockdown has kept the variant at bay so far. Some part of the world have managed to keep Omicron out – just look at Western Australia. On Monday, incoming health Minister Ernst Kuipers said there was "very little space to relax a lot" as he pointed the high infection numbers, reported Dutch news website AD. ![]() Those Dutch citizens dreaming of an imminent end to the lockdown may be just that – dreaming. "My fear now, however, is that the government will brew something positive from the numbers again and reopen without promoting other measures such as mask wearing and ventilation".
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