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Germany issues world's strongest recommendation for mixing Covid-19 vaccines
By Niamh Kennedy, Jamie Gumbrecht & Frederik Pleitgen
Possible link to blood clots after Moderna vaccine
By Ellen Phiddian
Possible link between Pfizer and Moderna mRNA vaccines and rare heart inflammation under investigation
By Sophie Scott & Mary Lloyd
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Pfizer and Moderna Vaccines Likely to Produce Lasting Immunity, Study Finds (Published 2021)
By Apoorva Mandavilli