There are some side effects that are pretty common: sore arm, headache, fatigue, fever. But people are saying they've got other, wackier reactions. Is it the vaccine — or something else?
Though optimism grows in the U.S. as more and more people get vaccinated, the global picture is far from rosy. Several countries are struggling, and things continue to look grim.
India's COVID-19 caseload plummeted to record lows in February. Now a startling spike is causing health systems — and possibly law and order — to break down. What went wrong?
For decades, the U.S. has spent many millions hunting down viruses in hope of stopping a pandemic. Yet the efforts failed. A group of researchers thinks there's a better strategy for the future.
"This is the most effective way to enable movement of people between countries," an Israeli official says. Israel says this is the world's first bilateral agreement on COVID-19 vaccine passports.
Namibia's president says disparate global rates of vaccination represent "COVID apartheid." If you compare percentages of people vaccinated in the most populous countries, you can understand his ire.
India is grappling with shortages of hospital beds, oxygen and vaccines amid a sharp spike in COVID-19 cases. Scientists are scrambling to sequence new variants.