What Happened: News of fully vaccinated individuals testing positive for COVID seem to be making headlines everywhere. For example, six people who tested positive in a Sydney hotel quarantine had already been fully vaccinated. According to data from NSW Health’s weekly COVID-19 surveillance report, between April 10 and May 1, six people in quarantine who reported being fully vaccinated were among the 150 overseas cases recorded. One had received a one-shot vaccine, such as Johnson & Johnson, and the remaining cases had received both doses of a two-shot vaccine, such as Pfizer, AstraZeneca or Moderna. University of Sydney epidemiologist Dr. Fiona Stanaway said, given no COVID-19 vaccine is 100 percent effective, it was to be expected that some people who have been vaccinated test positive.
The New York Yankees recently announced that they had two coaches and one support staff member test positive for COVID despite all of them being fully vaccinated. In Seychelles, East Africa, the World Health Organization (WHO) said that on Tuesday it was reviewing coronavirus data in the region after the health ministry said more than a third of people who tested positive for COVID-19 in the past week had been fully vaccinated.
These are a few of many examples, but it shouldn’t come as a surprise as people have been warned throughout the pandemic that the full dosage of COVID vaccines will not be 100 percent effective. Canada’s Chief Public Health officer Teresa Tam, for example, recently reminded Canadians on Saturday that even those who are fully vaccinated are susceptible to COVID. She did say, however, that the risk of asymptomatic transmission is far lower for anyone who is fully vaccinated, but how much lower? What about asymptomatic individuals who are not vaccinated?