The UK Health Security Agency (UKHSA) has stated that nearly six months after the administration of second dose of any of the COVID-19 vaccines, protection against death from the Omicron variant was about 60% in those aged 50 years and above. The protection increased to about 95% two weeks after the administration of a booster shot.

The agency further stated that data point to high levels of protection against hospitalization from the booster dose. Effectiveness against hospitalization was found to be 90% for the Pfizer/BioNTech jab, which came down to 75%, 10-14 weeks following the booster dose. Effectiveness against hospitalization for Moderna jab was 90-95% up to 9 weeks following the booster shot.

Dr Mary Ramsay, chief of immunization at UKHSA, said that booster shots are offering high levels of protection against hospitalization and death in the most vulnerable people in the society… (The Guardian, January 27, 2022)