AstraZeneca vaccine up to 90% effective and easily transportable, says company The vaccine will likely be cheaper and easier to store than the others being developed. AstraZeneca Releases Promising Data on Its Coronavirus VaccineThe drug maker said its vaccine candidate was 70 percent effective on average, and potentially up to 90 percent effective, at preventing Covid-19 in an early analysis. Q&A: Where are we in the COVID-19 vaccine race?Drugmakers and research centres aroundthe world are working on COVID-19 vaccines, with large globaltrials of several of the candidates involving tens of thousandsof participants well underway. Opinion | The Latest Vaccine News Doesn’t Tell the Full StoryThe preliminary success of vaccines is a bright piece of news, but it’s darkened by the threat of a terrible winter. Pfizer reports final vaccine results: 95% efficacyExperts are eager to see the full data, but the top-line results are very positive. Q&A: Where are we in the COVID-19 vaccine race?Drugmakers and research centers around the world are working on COVID-19 vaccines, with large global trials of several of the candidates involving tens of thousands of participants well underway. Coronavirus live updates: Fauci encouraged by Moderna's vaccine news; Scott Atlas and Gretchen Whitmer spar over Michigan restrictionsPositive news from Moderna on vaccines. British PM Boris Johnson is self-isolating. Costco no longer OK with mask exemptions. Latest COVID news. Q&A: Where are we in the COVID-19 vaccine race?Drugmakers and research centers around the world are working on COVID-19 vaccines, with large global trials of several of the candidates involving tens of thousands of participants well underway.