(Reuters] -Two-dose COVID-19 vaccines failed to produce sufficient neutralizing antibodies against Omicron coronavirus variant. British scientists discovered this, indicating the possibility of increased infection in previously infected people or those who have not been vaccinated.

The University of Oxford released Monday’s results from an unpublished study in which they analysed blood from people who had received doses of AstraZeneca or Pfizer BioNTech vaccines.

Following findings by the UK health authority last week, which showed that boosters greatly restored protection against Omicron variant, British Prime Minister Boris Johnson said that it would take two shots to get rid of the Omicron virus.

Oxford found no evidence to suggest that Omicron vaccine recipients with lower levels of anti-infection antibodies could be at greater risk for severe diseases, hospitalisations or even death.

While these data are very important, they only provide a small part of the story. These data only focus on neutralizing antibodies following the second dose. They do not give us information about cellular immunity. This will be also tested,” stated Matthew Snape (an Oxford professor and coauthor).