Why Johnson & Johnson shots were paused — and why that’s so confusing

The US rollout of Johnson & Johnson’s single-dose Covid-19 vaccine was halted Tuesday as regulators race to investigate rare blood-clotting complications linked to the shot. The move may force thousands of people scheduled to receive the shot this week to scramble for an alternative. Both the Food and Drug Administration and the Centers for Disease … Continue reading "Why Johnson & Johnson shots were paused — and why that’s so confusing"

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Scientists haven’t figured out long Covid. Here are 5 of their best hypotheses.

Most people who get the coronavirus will fully recover and go right back to their lives. But the latest research suggests that at least 10 percent have long-term symptoms, even after their body has apparently cleared the virus. The condition, known as “long Covid,” has emerged as a scary feature of the pandemic — a … Continue reading "Scientists haven’t figured out long Covid. Here are 5 of their best hypotheses."

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