Vaccine supply continues to be an issue, and one UAB doctor said there is no guarantee that second shots will be available for those who received their first shots at one of their clinics.
Are We Hurtling or Hurdling Towards Herd Immunity for COVID-19?
Vaccines against COVID-19 were developed in record-smashing time, and now that the rollout has begun, attention is returning to herd immunity, in a real rather than hypothetical sense.
Herd immunity refers to the protection against an infectious disease that arises when a critical mass of individuals in a population becomes immune. The pathogen can’t find welcoming bodies, and the epidemic dies out. Once herd immunity is attained, mitigation measures can be relaxed. But if society opens too soon, a second and even third wave of disease can ensue – as we’ve seen.