According to the most comprehensive study of re-infection rates, coronavirus offers ‘at least’ as good ” an immune defense against future infections as a vaccine.
Previous illnesses provide about 85 percent protection against both asymptomatic and symptomatic reinfection, researchers said after following thousands of people who contracted the virus in the spring.
Although they found that a small number among the group were infected twice, they usually had a milder form of the disease.
It was estimated that one in five was infected, the findings, based on a study of 21,000 UK health workers, suggested that herds’ immunity could already delay the course of the pandemic. However, scientists have warned that they still do not know how long immunity lasts.
What does it say?