Robert Hart, Forbes Staff

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State Lotteries—Including Million Dollar Cash Prizes—Didn’t Boost Covid Vaccine Uptake, Study Finds

Researchers found no evidence the vaccine lotteries promoted by many states were effective and said more research is needed on alternative strategies to boost inoculation rates.

Novak Djokovic Will Compete In Australian Open Unvaccinated After Securing Medical Exemption

In an Instagram post, Djokovic said he was given “exemption permission” and would head to Australia to defend his title.

China Locks Down City Of 1.2 Million People After Three Covid Cases Amid ‘Zero Covid’ Strategy Before Olympics

Residents of Yuzhou join some 13 million people in Xi’an, who have been under strict lockdown since late December.

Twitter Permanently Bans Marjorie Taylor Greene For Repeated Covid-19 Misinformation

Greene still has access to her professional Twitter account, which the platform said has not violated its misinformation policies.

Soccer Star Messi Has Covid—Is Isolating In Argentina

Messi is one of four Paris Saint-Germain players isolating with Covid-19, the club said.

Covid Surges In 4 Of 5 Most Vaccinated States But Shots Help Keep Hospitalization, Deaths Down

Rhode Island, Maine, Connecticut and Massachusetts, all among the top five most vaccinated states, are battling the worst coronavirus outbreaks in the country.

France Blocks Most U.K. Travel Amid Omicron Surge

The U.K. reported the highest number of daily Covid-19 cases since the pandemic began on Wednesday and experts believe omicron could already be the dominant variant in London.

Pfizer, Moderna Vaccines Less Effective Against Delta In Elderly And Protection Wanes Rapidly Four Months After Second Covid Shot, Study Finds

The mRNA shots were around 20% effective at preventing infection with delta in males over age 65 months five through seven after completing vaccination.

Fast-Spreading Omicron Could Become Dominant Variant In Europe Within A Month, EU Leader Warns

Experts believe omicron could already be dominant in London and will soon be in Denmark and Norway.

Sanofi, GSK Say Covid Vaccine Works As Booster Shot

The vaccine’s release will be pushed back to 2022 following delays to main clinical trials, the companies said.