Russia's one-shot Sputnik Light vaccine shows 70 percent effectiveness against the Delta variant of the coronavirus three months after injection, the Russian Direct Investment Fund (RDIF) said on Wednesday, citing the vaccine's developer.

The data was submitted by the developer, the Gamaleya Institute, to medical website medRxiv ahead of a peer review and based on 28,000 participants who received a dose of Sputnik Light, compared with a control group of 5.6 million individuals who were not vaccinated, it said...