That article also says 'And in a glimmer of hope, scientists have found both the Pfizer and Moderna's jabs are effective at cutting the risk of severe illness caused by the strain'.
It also says that 'The results [of the research being discussed] suggest that the vaccines in current use will remain protective against the lambda variant and that monoclonal antibody therapy will remain effective.'
It's spreading in Peru and Chile because they're using the Chinese vaccine which is less effective. Don't panic yet!