By Manas Sharma, Simon Scarr and Jane Wardell
SYDNEY (Reuters) – The novel coronavirus pandemic has brought “herd immunity” to the public consciousness, kindling hope the phenomenon can help slow or even end the outbreak.
Herd immunity refers to a large portion of a community developing a degree of immunity to a virus, thereby reducing person-to-person spread. As a result, the whole community gains protection, not just those who are immune.
Graphic: How a vaccine slows the spread of a virus https://graphics.reuters.com/HEALTH-CORONAVIRUS/HERD%20IMMUNITY%20(EXPLAINER)/ygdvzmqqgpw/index.html
NATURAL INFECTION VS VACCINATION
There are two pathways to herd immunity: natural infection or vaccination.
Natural infection refers to when a large number of people have had a disease and recovered. However, the extent of protection via natural infection is unknown with the new coronavirus….