Johnson & Johnson said on Thursday that a real-world study showed its single-shot Covid-19 vaccine protects against breakthrough infections and hospitalizations for up to six months.
The study, sponsored by the vaccine developer, was conducted between Jan. 1 and Sept. 7 last year, before the Omicron variant was discovered. It is also yet to be peer-reviewed.
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J&J said protection against infection from its single-dose vaccine starts to wane only from the fourth month compared to the second month in the case of two-dose vaccines from rivals Pfizer Inc and BioNTech's as well Moderna.
No waning of protection was found for ICU admissions for all three vaccines, J&J said. The company said the study was carried out by collecting claims and laboratory data covering 168 million people.
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