A growing number of countries are looking at switching to different COVID-19 vaccines for second doses or booster shots amid supply delays and safety concerns that have slowed their vaccination campaigns.
Several medical studies to test the efficacy of switching COVID-19 vaccines are under way. A mixed schedule, where a shot of Pfizer's vaccine is given after an AstraZeneca shot, produced more antibodies than two AstraZeneca shots, an Oxford study said on June 28.
The following are countries that are weighing, or have decided to adopt, such a solution:
BAHRAIN
* Bahrain said on June 4 that eligible candidates could receive a booster shot of the Pfizer/BioNTech or the Sinopharm vaccine, regardless of which shot they had initially taken.
CANADA
* The country's National Advisory Committee on Immunization said on June 17 that the provinces should offer recipients of a first dose of AstraZeneca's vaccine a different shot for their second dose, CBC News reported.
The committee had said earlier this month that people first injected with an AstraZeneca shot could choose to receive a different vaccine for their second dose.
ITALY
* Italy's medicine agency AIFA said on June 14 that people under the age of 60 who were inoculated with a first dose of the AstraZeneca shot can receive a different second shot.
RUSSIA
* Russia may start trials on a COVID-19 vaccine combining its Sputnik V vaccine and various Chinese shots in Arab countries, the Interfax news agency quoted Russia's RDIF sovereign wealth fund as saying on June 4.
The RDIF also said that no negative side-effects were found during clinical trials combining COVID-19 vaccine using the AstraZeneca and Sputnik V shots, Interfax reported.
SOUTH KOREA
* South Korea said on June 18 that some 760,000 people who were inoculated with a first dose of AstraZeneca's will receive Pfizer's jab as a second shot due to shipment delays by global vaccine sharing scheme COVAX.
SPAIN
* Health Minister Carolina Darias said on May 19 Spain would allow people under 60 who received an AstraZeneca shot first to get a second dose of either the AstraZeneca or Pfizer vaccine, after preliminary results of a study by the state-backed Carlos III Health Institute.
UNITED ARAB EMIRATES
* The United Arab Emirates have made the Pfizer/BioNTech coronavirus vaccine available as a booster shot to those initially immunised with a vaccine developed by the China National Pharmaceutical Group (Sinopharm).
A representative of Mubadala Health, part of the state fund, said a different vaccine could be provided as a booster shot but this was at the recipient's discretion and health professionals did not make recommendations.
UNITED KINGDOM
* Novavax said on May 21 it would take part in a mix-and-match vaccine trial starting in June in the United Kingdom to test the use of an additional vaccine dose from a different producer as a booster.
UNITED STATES
* The U.S. National Institutes of Health (NIH) said on June 1 it had started a clinical trial on fully vaccinated adults to evaluate the safety and immunogenicity of a booster shot of a different vaccine.
Reuters
Tue Jun 29 2021
![Factbox - Countries weigh 'mix and match' COVID-19 vaccines Factbox - Countries weigh 'mix and match' COVID-19 vaccines](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2021-06/71624950689_VIALS.jpg)
A mixed schedule, where a shot of Pfizer's vaccine is given after an AstraZeneca shot, produced more antibodies than two AstraZeneca shots, an Oxford study said on June 28. REUTERSpic
![Jokowi ke Abu Dhabi untuk perbincangan dengan Presiden UAE mengenai kerjasama Jokowi ke Abu Dhabi untuk perbincangan dengan Presiden UAE mengenai kerjasama](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2022-08/41660792602_jokowi.jpg)
Jokowi ke Abu Dhabi untuk perbincangan dengan Presiden UAE mengenai kerjasama
Presiden Jokowi dijadual bertemu rakan sejawatannya dari UAE pada 17 Julai.
![Tiga jurusolek lelaki berperwatakan wanita didakwa rompak rakan Tiga jurusolek lelaki berperwatakan wanita didakwa rompak rakan](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2023-01/81673948647_TBGAVEL.jpg)
Tiga jurusolek lelaki berperwatakan wanita didakwa rompak rakan
Kesemua mereka dakwa mengikut Seksyen 395 Kanun Keseksaan yang membawa hukuman penjara maksimum 20 tahun dan boleh dikenakan denda dan sebat, jika sabit kesalahan.
![Timbalan Speaker Dewan Rakyat buat laporan polis berkaitan hasutan, fitnah di Facebook Timbalan Speaker Dewan Rakyat buat laporan polis berkaitan hasutan, fitnah di Facebook](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2023-06/61686778902_RamliMohdNor.jpg)
Timbalan Speaker Dewan Rakyat buat laporan polis berkaitan hasutan, fitnah di Facebook
Datuk Ramli Mohd Nor mendapati hantaran pemilik akaun itu sangat tidak berasas dan tidak bertanggungjawab.
AWANI Ringkas: Pan-Gon letak jawatan | Ini pandangan peribadi
Ikuti rangkuman berita utama yang menjadi tumpuan sepanjang hari di Astro AWANI menerusi AWANI Ringkas.
![Agong berkenan berangkat ke pra-Mesyuarat Majlis Raja-Raja ke-266 Agong berkenan berangkat ke pra-Mesyuarat Majlis Raja-Raja ke-266](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/71721119877_SultanIbrahim.jpg)
Agong berkenan berangkat ke pra-Mesyuarat Majlis Raja-Raja ke-266
Yang di-Pertuan Agong Sultan Ibrahim berkenan berangkat ke pra-Mesyuarat Majlis Raja-Raja (MRR) ke-266 di Istana Negarahari ini.
![Status ADUN Rembia: DUN Melaka tunggu surat rasmi Status ADUN Rembia: DUN Melaka tunggu surat rasmi](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/51721108165_ADUNRembiaPN.jpg)
Status ADUN Rembia: DUN Melaka tunggu surat rasmi
Speaker DUN Melaka, Datuk Ibrahim Durum berkata, setakat ini pihaknya belum dimaklumkan secara rasmi dan perbincangan berhubung perkara itu akan diadakan.
![Warga emas bersalah bunuh abang, kakak ipar Warga emas bersalah bunuh abang, kakak ipar](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/41721119130_wargaemasbersalah.jpg)
Warga emas bersalah bunuh abang, kakak ipar
Mahkamah Tinggi di sini hari ini mensabitkan kesalahan seorang warga emas atas dua pertuduhan pindaan membunuh abang dan kakak iparnya dua tahun lalu.
![PAC beri tempoh tiga bulan kepada HRD Corp kemuka laporan tindakan susulan PAC beri tempoh tiga bulan kepada HRD Corp kemuka laporan tindakan susulan](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/71721120782_TBMASERMIEYATI.jpg)
PAC beri tempoh tiga bulan kepada HRD Corp kemuka laporan tindakan susulan
Mas Ermieyati Samsudin berkata tempoh itu diberikan susulan laporan audit berkaitan, baru dibentangkan pada minggu lepas.
![Buli siber: Beberapa kementerian bincang perketat undang-undang - Fahmi Buli siber: Beberapa kementerian bincang perketat undang-undang - Fahmi](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/61721118437_FahmiFadzil.jpg)
Buli siber: Beberapa kementerian bincang perketat undang-undang - Fahmi
Penambahbaikan aspek perundangan akan diteliti kerajaan, termasuk mengadakan perbincangan dengan beberapa kementerian berkaitan dalam masa terdekat.
![Kementerian Digital sedia bantu PKS dalam pelaksanaan e-invois - Gobind Kementerian Digital sedia bantu PKS dalam pelaksanaan e-invois - Gobind](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2019-12/81575261818_GobindSinghDeo.jpg)
Kementerian Digital sedia bantu PKS dalam pelaksanaan e-invois - Gobind
Beliau menegaskan bahawa pelaksanaan e-Invois itu akan memberi manfaat, termasuk meningkatkan pendapatan PKS.
![Tidak perlu lagi kemas kini status COVID-19 dalam MySejahtera - KKM Tidak perlu lagi kemas kini status COVID-19 dalam MySejahtera - KKM](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/81721100784_TBmysj.jpg)
Tidak perlu lagi kemas kini status COVID-19 dalam MySejahtera - KKM
Jika positif COVID-19 melalui ujian kendiri, pesakit boleh mengunjungi klinik dan hospital berdekatan bagi mendapatkan pengesahan.
![Ancaman keganasan di Asia Tenggara bersifat sederhana rendah - Ahmad Zahid Ancaman keganasan di Asia Tenggara bersifat sederhana rendah - Ahmad Zahid](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/41720707023_TBZahidHamidi.jpg)
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 Kerajaan tanggung kerugian RM185 juta akibat lebihan vaksin COVID-19 - Dr Dzulkefly](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/51720674506_DzulkeflyAhmad.jpg)
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 TPR positif COVID-19, prosiding bela diri Dr Roland ditangguh ke 23 Sept](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-07/71719815159_DrRolandVictorMD.jpg)
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 Sarawak mahu lebih ramai kontraktor Bumiputera kelas lebih tinggi - Uggah](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-06/71719670940_TBUnggah.jpg)
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 KKM keluarkan perincian semakan semula SOP bagi COVID-19 dalam masa terdekat](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-06/41719648068_DrDzulkeflyAhmad.jpg)
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 Dulu jurutera, sekarang usahawan cili](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-06/61719073622_PetaniASrinath.jpg)
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 Bantu anak-anak istimewa autisme, fahami kekurangan mereka](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-06/71718882192_SITINURHIDAYAHSHA.jpg)
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 Berita antarabangsa pilihan sepanjang hari ini](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-03/71709993909_TBBERITAx.jpg)
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 Malaysia masuk fasa hidup bersama virus COVID-19 - Dr Dzulkefly](https://resizer-awani.eco.astro.com.my/tr:w-177,h-100,q-100,f-auto/https://img.astroawani.com/2024-06/71717830160_DrDzulkeflyAhmad.jpg)
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.