MADRID (AP) — Spain’s health authorities will offer a second dose to people who have received a shot of the Johnson & Johnson COVID-19 vaccine. But the second shot will be from a different drug manufacturer. Spain’s health ministry said on Wednesday that the Johnson & Johnson vaccine has proven to be less effective than other vaccines. So Spaniards who have received it will now be offered a booster shot of either the Pfizer-BioNTech or the Moderna vaccines once three months have passed. Only 1.9 million of the 37 million Spaniards who have been vaccinated have received the J&J shot.