By Sahar Chmais
Based on a preliminary study, the Johnson & Johnson COVID-19 vaccine may not be as effective in protecting against the Delta and Lambda variants, according to a study.
The study was conducted in a laboratory using blood samples, which may not be what is reflected in the real world. Still, authors of the study suggested that those who received one J&J vaccine may need a booster shot, which may be more effective if taken as the mRNA form, used by Pfizer and Moderna.
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