Tag Archives: natural immunity

Natural infection versus vaccination: Differences in COVID antibody responses emerge

Vaccination produces greater amounts of circulating antibodies than natural infection. But a new study suggests that not all  B  are created equal. While vaccination gives rise to memory B cells that evolve over a few weeks, natural infection births memory B cells that continue to evolve over several months, producing highly potent antibodies adept at eliminating even viral variants.

The findings highlight an advantage bestowed by natural infection rather than vaccination, but the authors caution that the benefits of stronger memory B cells do not outweigh the risk of disability and death from COVID-19.

Natural infection versus vaccination: Differences in COVID antibody responses emerge
Hope for a future without fear of COVID-19 comes down to circulating antibodies and memory B cells. Unlike circulating antibodies, which peak soon after vaccination or infection only to fade a few months later, memory B cells can stick around to prevent severe disease for decades. And they evolve ov…

Increases in COVID-19 are unrelated to levels of vaccination across 68 countries and 2947 counties in the United States – European Journal of Epidemiology

At the country-level, there appears to be no discernable relationship between percentage of population fully vaccinated and new COVID-19 cases in the last 7 days (Fig. 1). In fact, the trend line suggests a marginally positive association such that countries with higher percentage of population fully vaccinated have higher COVID-19 cases per 1 million people. Notably, Israel with over 60% of their population fully vaccinated had the highest COVID-19 cases per 1 million people in the last 7 days. The lack of a meaningful association between percentage population fully vaccinated and new COVID-19 cases is further exemplified, for instance, by comparison of Iceland and Portugal. Both countries have over 75% of their population fully vaccinated and have more COVID-19 cases per 1 million people than countries such as Vietnam and South Africa that have around 10% of their population fully vaccinated.

Increases in COVID-19 are unrelated to levels of vaccination across 68 countries and 2947 counties in the United States - European Journal of Epidemiology
European Journal of Epidemiology -

Harvard Epidemiologist Says the Case for COVID Vaccine Passports Was Just Demolished

…vaccinated individuals were 27 times more likely to get a symptomatic COVID infection than those with natural immunity from COVID.

Harvard Epidemiologist Says the Case for COVID Vaccine Passports Was Just Demolished
A new study on Israel’s COVID outbreak found that vaccinated individuals had 27 times higher risk of symptomatic COVID infection than those with natural immunity from prior COVID infection.