It has been announced that a vaccinated 31-year-old Spanish woman in Spain caught Covid twice within 20 days, the shortest known gap between infections, according to a leading medical institute in Catalunia.
The patient tested positive in December 2021 and again in January 2022.
The woman, who was not only fully vaccinated but had also received a booster shot 12 days previously, tested positive on 20th December.
She didn’t develop any symptoms, and self-isolated for 10 days before returning to work.
Just 20 days later, on 10 January 2022, she developed a cough and had a high temperature so did another PCR test was also turned out to be positive.
Researchers from the Institut Català de la Salut in Tarragona showed that her first infection was with the Delta variant and the second was with the Omicron variant – the latter being more infectious.
In a press statement the Institut said: “This case highlights the potential of the Omicron variant to evade the previous immunity acquired either from a natural infection with other variants or from vaccines.”
“Such monitoring will help detect variants with the ability to partially evade the immune response.”