JOHANNESBURG (AP) — South Africa has suspended plans to inoculate its front-line health care workers with the AstraZeneca vaccine after a small clinical trial suggested that it isn’t effective in preventing mild to moderate illness from the variant dominant in the country. South Africa received its first 1 million doses of the AstraZeneca vaccine last week and was expected to begin giving jabs to health care workers in mid-February. The disappointing early results indicate that an inoculation drive using the AstraZeneca vaccine may not be useful. The trial results, which aren’t yet peer-reviewed, suggested the AstraZeneca vaccine “provides minimal protection against mild-moderate COVID-19 infection” among young adults exposed to the South Africa variant.