Vaccinated People Just as Likely to Spread the Delta Variant as the Unvaccinated, Yearlong Study Shows

October 29th, 2021

Awake Goy

People inoculated against Covid-19 are just as likely to spread the delta variant of the virus to contacts in their household as those who haven’t had shots, according to new research.

In a yearlong study of 621 people in the U.K. with mild Covid-19, scientists found that their peak viral load was similar regardless of vaccination status, according to a paper published Thursday in The Lancet Infectious Diseases medical journal. The analysis also found that 25% of vaccinated household contacts still contracted the disease from an index case, while 38% of those who hadn’t had shots became infected.

The results go some way toward explaining why the delta variant is so infectious even in nations with successful vaccine rollouts, and why the unvaccinated can’t assume they are protected because others have had shots. Those who were inoculated cleared the virus more quickly and had milder cases, while unvaccinated household members were more likely to suffer from severe disease and hospitalization.

“Our findings show that vaccination alone is not enough to prevent people from being infected with the delta variant and spreading it in household settings,” said Ajit Lalvani, a professor of infectious diseases at Imperial College London who co-led the study. “The ongoing transmission we are seeing between vaccinated people makes it essential for unvaccinated people to get vaccinated to protect themselves.”