Covid-19: Remarkable results from blood donor survey
A study led by authors from the National Blood Service, shows that a large percentage of the population has likely already been infected with SARS-CoV-2 and that there are striking differences in prevalence between blacks and whites, reported BizCommunity (16 Feb 2021). Over seven days between 7 and 25 January, 4 858 blood donors were tested for antibodies to the virus that causes Covid-19. The tests were done in four provinces: 1 457 in Eastern Cape, 463 in Northern Cape; 831 in Free State and 2 107 in KwaZulu-Natal.
“Extrapolating their results to the whole population, the researchers estimated that 63% of people in Eastern Cape have been infected since the epidemic started, 32% in Northern Cape, 46% in Free State and 52% in KwaZulu-Natal. This is massively more than the clinically confirmed case rates of between 2 and 3% in these four provinces.
“Black people were between three (Northern Cape) and five (KwaZulu-Natal) times more likely than white people to have antibodies to the virus. Asians in KwaZulu- Natal had higher prevalence than whites, but lower than blacks. The researchers did not find any significant differences across age or sex.”