Pfizer announced Saturday that tweaking its COVID-19 vaccine to better target the omicron variant is safe and works — just days before regulators debate whether to offer Americans updated booster shots this fall.
The vaccines currently used in the U.S. still offer strong protection against severe C...
The light bulb hanging from the ceiling flickered on and off, infuriating the technician in this remote Ugandan town as he checked the refrigerators filled with vaccine doses to confirm they were still working.
If the power supply didn’t stabilize, he said, he would have to requisition fuel and sta...
