4回目のワクチン接種もあるかも・・・

Covid deaths highest in a year as omicron targets the unvaccinated and elderly

 

Omicron has been particularly lethal to people over 75, the unvaccinated and the medically vulnerable, according to doctors and public health officials.

“Omicron may be less severe for younger people, but it will still find vulnerable seniors in our community,” Salemi said. “That vaccination back in February isn’t as effective now if you aren’t boosted.”

Several states including Illinois are seeing deaths on par with last winter’s peak.

“This disease is still killing Alabamians. It’s still a severe illness; it’s still more deadly than other common respiratory illnesses; it’s something people should take very seriously, especially those who have underlying conditions,” Stubblefield said.

Most of the current fatalities are among unvaccinated patients and a significant number are immunosuppressed because they are undergoing chemotherapy, have received an organ transplant or have a disease that harms the immune system, Marroquin said.

感染力がつよくて死者数は以前同様に伸びるかもね。

Booster effectiveness wanes after 4 months, but showed sturdy protection against hospitalization, CDC study shows

Researchers found the booster shots remained highly effective against moderate and severe covid-19 for about two months after a third dose. But their effectiveness declined substantially after four months, suggesting the need for additional boosters, the study said.

The vaccine was 91 percent effective in preventing a vaccinated person from being hospitalized during the two months after a booster shot, the study found. But after four months, protection fell to 78 percent.

Protection faded more in preventing trips to urgent care and emergency departments, falling from 87 percent in the first two months to 66 percent after four months. After more than five months, vaccine effectiveness fell to roughly 31 percent, but researchers noted that estimate was “imprecise because few data were available” for that group of people.

 Waning protection after a third vaccine dose “reinforces the importance of further consideration of additional doses to sustain or improve protection against COVID-19-associated” visits to emergency departments and urgent care and hospitalizations, the study said.

追加接種は強力な重症化予防効果があるけど、それも4ヶ月後には７８％、5ヶ月後には３１％ ・・・・ということで効果が減退するので、4回目の接種も必要になってくるかもしれない、と。