Moderna Inc said it had secured a new Covid-19 vaccine supply agreement with Israel for 2022, under which the country has the option to buy doses of one of the company's variant-specific vaccine candidates.

The announcement follows two earlier agreements between Israel and Moderna to supply a total of 10 million doses of the Covid-19 vaccine, according to Reuters.

Moderna's booster vaccine is in early-stage trials. The company in April said it should be able to provide a booster shot for protection against variants of the novel coronavirus by the end of this year.