Among people infected by the Delta variant of the coronavirus, fully vaccinated people with “breakthrough” infections may be just as likely as unvaccinated people to spread the virus to others, new research suggests. The higher the amount of coronavirus in the nose and throat, the more likely the patient will infect others.

The Lambda variant of the coronavirus, first identified in Peru and now spreading in South America, is highly infectious and more resistant to vaccines than the original version of the virus the emerged from Wuhan, China, Japanese researchers have found.

Among fully vaccinated people who never had COVID-19, getting a third dose of an mRNA vaccine from Pfizer (PFE.N)/BioNTech or Moderna (MRNA.O) would likely increase levels of antibodies, but not antibodies that are better able to neutralize new virus variants, Rockefeller University researchers reported on Thursday on bioRxiv ahead of peer review.

Source: Delta infections among vaccinated likely contagious; Lambda variant shows vaccine resistance in lab | Reuters