Daily Archives: August 31, 2021

Herd Immunity

Any notion that Covid-19 was going to last for only a few months was very much misplaced in 2020. Especially after it was recognized that the SARS-CoV-2 virus was largely spread through the airborne route, all indications were that it would cause repeat bouts of waves.

This is what happened in the flu epidemic of 1918. In addition, very few scientists predicted that we would see the type of mutations that occurred over such a short period of time. This has resulted in the virus becoming both more transmissible and more able to evade immune responses.

The evolution of the virus has been so rapid that the Delta variant, which is now dominating the world, is at least twice as transmissible as the ancestral virus that was circulating.

Read more at “Why herd immunity isn’t going to happen”

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Delta Covid Crisis

China’s seemingly impregnable Covid-19 firewall is springing leaks, with the country logging more local cases in 20 days than in the previous five months combined.  At least 15 of the nation’s 31 provinces have confirmed Delta strain infections over the past two weeks, marking China’s biggest outbreak this year. The disease’s spread is believed to have started from a foreign flight at Nanjing’s airport in early July.

The National Health Commission (NHC) said 328 cases have been reported since last month, including in the central city of Wuhan, the original epicenter of the global pandemic. Authorities reported 99 new cases according to reports.

Millions are now in lockdown as authorities close down cities and restrict travel to arrest the contagion’s further spread. The outbreak has been sparked in part by a recent easing of mask-wearing and social distancing, a laxity caused by the fact the country was Covid-free for many months.

Read more at “Delta puts China on brink of a new Covid crisis”

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