The effectiveness of COVID-19 vaccines for people in American nursing homes and long-term care facilities, where residents are often elderly and frail, has dropped since the Delta variant became dominant in the United States, government researchers said on Wednesday.
Despite this decline, the vaccines are still highly effective at preventing illness severe enough to require hospitalization, according to research published in the U.S. Centers for Disease Control and Prevention's (CDC) Morbidity and Mortality Weekly Report.
The spread of the highly infectious Delta variant, which according to CDC data accounted last month for more than 80% of new U.S. infections, has complicated efforts to combat the pandemic in the United States and globally.
CDC researchers compared weekly data from 3,862 nursing homes and long-term care facilities spanning March 1 to May 9, before Delta became widespread, to data from 14,917 such facilities covering June 21 to Aug. 9, when the variant was responsible for the majority of new infections.
They found that efficacy of the two-dose vaccines from Pfizer/BioNTech and Moderna for preventing any coronavirus infection - mild or severe - dropped from 74.7% to 53.1%. Effectiveness estimates were similar for the Pfizer-BioNTech and Moderna vaccines, they said.
The study's findings https://bit.ly/3mebUYT were cited by federal health officials on Wednesday in their announcement that COVID-19 booster shots would be made widely available https://www.reuters.com/world/us/us-start-offering-covid-19-vaccine-booster-doses-september-2021-08-18 to Americans beginning on Sept. 20, with protection from initial vaccination waning over time.
The first groups to receive those boosters will include nursing home residents and other elderly Americans, as well as people with weak immune systems.
"Because the Delta variant became prominent in the United States within six months after the initial vaccine rollout to nursing home residents, we could not determine if the lower vaccine effectiveness seen in June-July in this study was due to potential waning immunity, reduced protection against the Delta variant, or a combination of both factors," CDC epidemiologist Dr. Srinivas Nanduri said.
In a second study https://bit.ly/3AS7Cub, New York State Department of Health officials found that by late July, 65% of New York adults had been fully vaccinated with two doses of the Pfizer/BioNTech or Moderna shots or one dose of the Johnson & Johnson shot.
Between early May and late July, the vaccines' effectiveness for preventing new infections dropped from 91.7% to 79.8%, the study found. Vaccine efficacy at preventing hospitalization held steady, ranging from 91.9% to 95.3%, it found.
The effectiveness of the two-dose vaccines against hospitalization lasts at least six months, according to a separate study https://bit.ly/2Wa8kEm by researchers in 18 U.S. states who reviewed data from 3,089 hospitalized patients, including 1,194 with COVID-19.
Vaccine efficacy against COVID-19-associated hospitalization was 86% between two and 12 weeks from receipt of the second vaccine dose, they found. It was 84% between 13 and 24 weeks, with no significant change between these periods, they found. Over the full six months, they found, it was 90% among adults without immunocompromising conditions.
Reuters
Thu Aug 19 2021
A syringe is filled with a dose of Pfizer's COVID-19 vaccine at a pop-up community vaccination center at the Gateway World Christian Center in Valley Stream, New York, U.S., February 23, 2021. REUTERS/Brendan McDermid
Suspek kes kematian Nur Farah Kartini direman tujuh hari
Perintah reman terhadap suspek lelaki berusia 26 tahun itu dikeluarkan Hakim Nurul Mardhiah Mohammed Redza.
Impact of cloud complexity on cybersecurity risk and AI's role in this mix
Organizations who are adopting multi-cloud or hybrid cloud environments are having to navigate new complexities that emerge as they expand on cloud. As these cloud environments lead to the expansion of attack surfaces, a global survey conducted by Gigamon found that 93% of IT and security leaders predict cloud security attacks will increase this year.
[Data & Statistik] Prestasi Bursa Malaysia setakat 16 Julai 2024
Jumlah dagangan meningkat kepada 5.36 bilion unit bernilai RM3.95 bilion daripada 4.58 bilion unit bernilai RM3.72 bilion pada Jumaat.
[Data & Statistik] Kedudukan MYR berbanding SGD setakat 16 Julai 2024
Niaga AWANI bawakan prestasi terkini prestasi MYR berbanding SGD.
[Data & Statistik] Prestasi ringgit setakat 16 Julai 2024
Ketua Ahli Ekonomi Bank Muamalat Malaysia Bhd Dr Mohd Afzanizam Abdul Rashid berkata walaupun ringgit merosot, kontrak niaga hadapan Dana Fed menunjukkan bahawa penurunan kadar faedah mungkin akan berlaku pada September depan.
Sekurang-kurangnya 4 maut, insiden tembakan di masjid di Oman
Beberapa orang turut cedera akibat terkena tembakan di sekitar masjid di Wadi al-Kabir, Muscat.
Penjara menanti pesalah MH17 jika keluar dari Rusia - Pendakwa raya
Menurut Digna van Boetzelaer, kerajaan Belanda tidak pernah meminta ekstradisi mereka kerana Rusia tidak mengekstradisi rakyatnya sendiri.
E-invois dibimbangi tekan pengusaha PKS
Isu yang timbul ialah pengetahuan dan kos tinggi yang diperlukan untuk melaksanakannya, termasuk kos latihan dan penambahbaikan sistem dan perisian.
Tawaran pengambilalihan MAHB dimuktamad suku ketiga 2024 - MOF
Tawaran pengambilalihan Malaysia Airports Holdings Bhd (MAHB) dijangka akan dimuktamadkan pada suku ketiga tahun ini dan ia perlu dipersetujui oleh sekurang-kurangnya 90 peratus pemegang saham sedia ada MAHB.
Kementerian Kewangan berkata memandangkan tawaran itu merupakan satu urusan transaksi komersial, maka ia tidak mendatangkan sebarang implikasi kewangan kepada kerajaan.
Kementerian Kewangan berkata memandangkan tawaran itu merupakan satu urusan transaksi komersial, maka ia tidak mendatangkan sebarang implikasi kewangan kepada kerajaan.
[KOLUMNIS] Masa depan industri perhubungan awam: Memperkukuh kepercayaan, keterlibatan melalui integriti, inovasi
Dengan sokongan tiga pertubuhan utama, ekosistem ini hadapi cabaran signifikan, namun berpotensi besar untuk berkembang dan berinovasi.
Ancaman keganasan di Asia Tenggara bersifat sederhana rendah - Ahmad Zahid
Timbalan Perdana Menteri Datuk Seri Ahmad Zahid Hamidi berkata ancaman keganasan masih wujud di rantau Asia Tenggara namun ia bersifat sederhana rendah.
Kerajaan tanggung kerugian RM185 juta akibat lebihan vaksin COVID-19 - Dr Dzulkefly
Malaysia menanggung kerugian lebih RM185 juta akibat lebihan vaksin COVID-19 setakat 11 Jun lalu, kata Menteri Kesihatan, Datuk Seri Dr Dzulkefly Ahmad.
TPR positif COVID-19, prosiding bela diri Dr Roland ditangguh ke 23 Sept
Pada 5 Julai 2021, Dr Roland didakwa atas pertuduhan membuat dan memulakan hantaran video bersifat jelik dengan niat untuk menyakitkan hati orang lain di Facebook.
Sarawak mahu lebih ramai kontraktor Bumiputera kelas lebih tinggi - Uggah
Kerajaan bukan setakat mahu melihat lebih ramai kontraktor Bumiputera berjaya malah pada masa sama mahu menambah bilangan mereka berdaftar dalam kelas yang lebih tinggi.
KKM keluarkan perincian semakan semula SOP bagi COVID-19 dalam masa terdekat
Kementerian Kesihatan akan mengeluarkan perincian semakan semula prosedur operasi standard (SOP) berkaitan COVID-19 dalam waktu terdekat.
Dulu jurutera, sekarang usahawan cili
Srinath tinggalkan kerjaya sebagai jurutera perisian kerana mahu beri tumpuan pada tanaman cili secara fertigasi.
Bantu anak-anak istimewa autisme, fahami kekurangan mereka
Suara jeritan diikuti dengan tangisan membuatkan beberapa orang pelanggan Tong Kayu Cafe, Bayan Lepas (Pulau Pinang) berhenti makan sambil menghalakan pandangan ke arah wanita itu.
Berita antarabangsa pilihan sepanjang hari ini
Antara pelbagai berita luar negara yang disiarkan di Astro AWANI, berikut adalah yang paling menjadi tumpuan sepanjang hari ini.
Malaysia masuk fasa hidup bersama virus COVID-19 - Dr Dzulkefly
Rakyat kini berada di fasa hidup bersama virus COVID-19 dan dalam peralihan ke arah meneruskan kehidupan seperti biasa, kata Menteri Kesihatan Datuk Seri Dr Dzulkefly Ahmad.
Labuan terima RM162 juta untuk infrastruktur pendidikan
Kementerian Pendidikan Malaysia (KPM) meluluskan peruntukan keseluruhan RM162 juta untuk tujuh projek pembangunan infrastruktur di pulau bebas cukai ini bagi tahun 2024.