(Reuters) - A Johnson & Johnson scientist said on Friday that the company has received preliminary reports of two cases of severe allergic reactions, including one case of anaphylaxis, in people who had received the company's COVID-19 vaccine. More »

WASHINGTON (Reuters) - The head of the U.S. Centers for Disease Control and Prevention said on Friday that a recent decline in COVID-19 cases may be stalling, a development she described as concerning while urging that safeguards to fight the virus remain in place. More »

TORONTO (Reuters) - A shipment of 500,000 doses of the COVID-19 vaccine developed by AstraZeneca and Oxford University and made by the Serum Institute of India is set to arrive in Canada on Wednesday, the chief executive of local partner Verity Pharmaceuticals said on Friday. More »

(Reuters) - The United States has administered 70,454,064 doses of COVID-19 vaccines in the country as of Friday morning and distributed 94,300,910 doses. More »

SEOUL (Reuters) - South Korea said 18,489 people received their first doses of AstraZeneca PLC's vaccine by midnight on Friday as it launched an ambitious COVID-19 inoculation campaign, and will begin using Pfizer/BioNTech vaccines on Saturday. More »

(Reuters) - The U.S. Centers for Disease Control and Prevention said it was closely following outbreaks of Ebola in Democratic Republic of Congo (DRC) and Guinea, and said the risk of Ebola to the United States was extremely low. More »

(Reuters) - The following is a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus. More »

SEOUL (Reuters) - South Korean has begun a review of Johnson & Johnson's coronavirus vaccine after the U.S. pharmaceutical firm submitted an application for approval, the government said on Saturday. More »