The abortion-tainted Novavax shot, which relies on a novel nanoparticulate adjuvant called Matrix-M, presents safety concerns and is largely ineffective.
Unsurprisingly, the timeline for the planned release of the fall COVID shots is more or less in lockstep with the United States, which is looking to release a new 'updated' jab as early as next month.
In the largest study of its kind to date, 42 percent of women who were menstruating regularly reported breakthrough bleeding after receiving a COVID-19 vaccine. Study participants who did not normally menstruate – including women on long-acting contraceptives and post-menopausal women – also experienced unusual bleeding.