Singapore — While many Singaporeans opted to pay for their Sinovac Covid-19 vaccines instead of getting free mRNA jabs, a decrease in their antibodies against infection has prompted some to seek booster shots from Pfizer or Moderna. Tests administered to people who received China-made Sinovac jabs, which uses an inactivated virus containing Sars-CoV-2 spike proteins … Continue reading COVID-19 | Singaporeans who got Sinovac jabs now getting Pfizer boosters to increase antibody levels