For most of this year, the JN.1 variant of the coronavirus accounted for an overwhelming majority of Covid cases. But now, an offshoot variant called KP.2 is taking off. The variant, which made up just one percent of cases in the United States in mid-March, now makes up over a quarter. KP.2 belongs to a…
Even leading experts in vaccine science have run up against disbelief and ambivalence. Dr. Gregory Poland, 68, editor in chief of the journal Vaccine, said that a loud whooshing sound in his ears had accompanied every moment since his first shot, but that his entreaties to colleagues at the Centers for Disease Control and Prevention…
Vaccines for respiratory syncytial virus may have caused a few cases of Guillain-Barré syndrome, a rare neurological condition, federal health officials said on Thursday. The numbers were small, on the order of two cases per 100,000 vaccinated people or fewer, and much more data is needed to pin down the risk, the officials said. In…
Over the last few years, the general assumption has been that a Covid infection — or vaccination — is likely to buy you a few months of protection. But any time we get a new variant that is especially adept at evading the immune system, like JN.1, that assumption gets thrown into question. JN.1 currently…
Over the last few years, the general assumption has been that a Covid infection — or vaccination — is likely to buy you a few months of protection. But any time we get a new variant that is especially adept at evading the immune system, like JN.1, that assumption gets thrown into question. JN.1 currently…
If you’ve presented the same arm for every dose of a particular vaccine, you may want to reconsider. Alternating arms may produce a more powerful immune response, a new study suggests. The researchers studied responses to the first two doses of Covid-19 vaccines. Those who alternated arms showed a small increase in immunity over those…
