The World Health Organization says more than two-thirds of the population will have significant Covid-19 antibodies, either through vaccination or previous infection. The WHO cited a summary of global studies which shows that the seroprevalence rate rose from 16% in February 2021 to 67% in October.
According to a Bloomberg report, officials say the rapid spread of the Omicron variant could mean the figure is even higher right now. The latest data shows just how much global resistance to the virus is improving. The WHO adds that while vaccines offer only limited protection against Omicron infection, all countries should further increase their inoculation rates, especially for high-risk groups.
The organization points out that vaccination always offers better protection against serious diseases than previous infection alone. However, people who have already had Covid-19 and who are also fully vaccinated are best protected against serious illnesses, but the WHO says it does not yet know if this remains the case with the new variants.
Meanwhile, the data shows lower seroprevalence levels in children under 9 and people over 60, compared to people in their 20s. In low- and middle-income countries, seroprevalence is primarily the result of prior infection as opposed to vaccination.
The WHO says antibody levels will decline over time and depend on many other factors, with further research needed to determine the duration of protection.
THE SOURCE: Bloomberg