He said it was “safe to say” airborne transmissions were a reality, and that this explains the rapid rate at which the coronavirus is being transmitted.After a recent study by the Spanish government and the country’s leading epidemiologists, it was found that just 5% of those tested across the country maintained antibodies to the virus.
Madhi said after a patient becomes infected, many people lose antibodies after two to three months, but that “doesn’t mean there isn’t underlying immunity”. “People who have had a severe disease tend to have this antibody circulating for longer, up to about three months, compared to people who had a mild illness.
“We can’t be certain that natural infection is going to induce broad spread community immunity, which is required to be able to break the back of this pandemic. “This is an area of concern. What it will require then is for us to get a vaccine sooner than later if natural infection is not doing the job it usually does in terms of inducing the immunity that protects one against developing severe disease and being re-exposed to the virus.”
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