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Researchers deliberately infect participants with SARS-CoV-2 in ‘challenge’ trials — but high levels of immunity complicate efforts to test vaccines and treatments. Researchers deliberately infect participants with SARS-CoV-2 in ‘challenge’ trials — but high levels of immunity complicate efforts to test vaccines and treatments.
Few of us may have heard of this virus, but now leading scientists warn that RSV (respiratory syncytial virus) poses a significant threat to some people's health.
We know that Omicron has caused less damage. But that could say more about the conditions in place when it arrived than the variant itself.
For more than two years, Cathy Baron and Sara Alicia Costa managed to duck the coronavirus. But despite their being fully vaccinated and boosted, the omicron
The conventional wisdom is that Omicron is less likely to cause serious illness, but that might have more to do with better immunity and treatments, not the virus itself.