U.S. regulators told COVID-19 vaccine makers Thursday that any booster shots tweaked for the fall will have to add protection against the newest omicron relatives.
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Researchers examining the threat of emerging COVID-19 strains predict Omicron BA.5 will account for nearly 70 per cent of cases in much of the country by Canada Day.
The number of new coronavirus cases rose by 18 per cent in the last week, with more than 4.1 million cases reported globally, according to the World Health Organization.
Researchers suggest antibodies found in llama blood could lead to the development of a spray to immunize against COVID-19, SARS and other coronaviruses.
Germany's BioNTech, Pfizer's partner in COVID-19 vaccines, said the two companies would start tests on humans of next-generation shots that protect against a wide variety of coronaviruses in the second half of the year.
COVID-19 cases in the Americas rose about 14% last week from the previous one, with 1.3 million new cases and 4,158 new deaths reported, the Pan American Health Organization (PAHO) said on Wednesday.
Health officials in South Korea on Wednesday approved the country's first domestically developed COVID-19 vaccine for people 18 years or older, adding another public health tool in the fight against a prolonged pandemic.
Canada Day celebrations are making a return after two years of scaled-down festivities because of the COVID-19 pandemic, but some Canadians hoping to catch a traditional parade may be out of luck.
