Bill Harvey: Stay clean

It seems that there is a place for expert opinion after all. And who better to offer expert advice on matters related to eye care than you? Here are some questions I have recently fielded.

What is herd immunity? This represents population immunity based on a majority having immunity conferred by a vaccine or previous infection, so covering the safety of the outlying minority who might not gain immunity through these routes. This applies when a vaccine is available, or immunity post-infection is confirmed. This is not yet the case with Covid-19, so our focus has to be avoidance of transmission – especially to those most at risk of mortality. As this risk group, the elderly, are also a major part of our patient base, we need to be very aware of this at all times (my domiciliary clinics have been postponed for the moment).