CURRENTNATIONAL Mix-and-match of two Covid-19 vaccines still being studied — KhairyEditor Selangor JournalJune 17, 2021 by Editor Selangor JournalJune 17, 2021 KUALA NERUS, June 17 — The government is still studying and considering the mix-and-match method of Pfizer-BioNTech and AstraZeneca Covid-19 vaccines to complete the two-dose...