Since early on in the pandemic, the World Health Organization has warned that people who have had Covid-19 are not necessarily immune from getting the virus again.
Yet the new study had some limitations, including that more research is needed to determine whether similar results would emerge among a larger group of patients and what data could show over longer periods of time when it comes to infection with the coronavirus, named SARS-CoV-2.
“This study has important implications when considering protection against re-infection with SARS-CoV-2 and the durability of vaccine protection,” the researchers wrote in the paper.
“This work confirms that protective antibody responses in those infected with SARS-COV2, the coronavirus that causes COVID-19, appear to wane rapidly. Whilst longer lasting in those with more severe disease, this is still only a matter of months,” Griffins said.
“Similar short-lived responses are seen against other human coronaviruses that predominantly cause only mild illness, meaning that we can be re-infected as time goes by and outbreaks can adopt seasonality. With the more serious, sometimes fatal, outcomes of SARS-COV2, this is troubling indeed,” Griffins said. “Vaccines in development will either need to generate stronger and longer lasting protection compared to natural infection, or they may need to be given regularly.”
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