Sinopharm may offer immunity for up to six months but more research needed, top UAE official says

There has been a significant decrease in the rate of hospital admissions in Abu Dhabi since the country began a mass vaccination campaign

Abu Dhabi resident Abdulaziz Karmastaji gets vaccinated at Seha's cruise ship terminal facility in January

Abu Dhabi resident Shaikha Al Dheiri waiting to get vaccinated.

A healthcare worker smiles for the cameras.

Nearly 20,000 people are vaccinated daily at the centre.

Mohamed Hawas Al Sadid, chief executive of Seha, said nearly 20,000 people are getting shots every day.

People in the waiting room.

An Emirati waits for her turn to get the vaccine.

A young Emirati at the vaccination centre at the Abu Dhabi Cruise Terminal area.

Aya, 24, and Jana, 18, after receiving the vaccine. The Sinopharm vaccine is available across the country without charge at dozens of hospitals, vaccination centres, majlis and clinics.

The Covid-19 vaccination drive is the country's largest to date. The health authorities aim to inoculate half the population by the end of the first quarter.

(L to R) - Emirati healthcare workers, Mouza Al Beshr, Khadija Al Nuaimi and Za,zam Al Naqbi at the Seha vaccination centre.

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The Sinopharm vaccine is expected to offer people immunity against Covid-19 for four to six months, a top doctor involved in the UAE trial said.

Dr Nawal Al Kaabi, chairwoman of the National Covid-19 Clinical Management Committee, said Abu Dhabi's public health provider recorded a "significant decrease" in the rate of hospital admissions after the country began a mass vaccination campaign.

That was despite the second wave of the pandemic being worse than the first, she said.

"The number of hospitalisations was much less and there were no critical care admissions seen among the vaccinated, 14 days post second dose," Dr Al Kaabi said on Friday at an online public health conference about the Covid-19 response.

“There was no mortality among the vaccinated. Even for those who got the infection, usually it is mild or asymptomatic.

“We also noticed that the duration of positivity is very short among the vaccinated.”

The duration of immunity offered by two doses of the vaccine is likely to last six months or less, although she said further data was needed to determine the exact period.

“What is the best estimate for how long the immunity will last? Now, it is around four to six months, however, we don’t have the final data,” said Dr Al Kaabi, a paediatric infectious diseases consultant and chief medical officer at Sheikh Khalifa Medical City.

“There is a possibility that we will need a booster dose like any other inactivated vaccine.”

The conference also received an update about the Sputnik V vaccine trial in the UAE, which should begin a small Phase 2 study. It will test a combination of Sputnik V and AstraZeneca shots.

“The advantage here is at the time when we have a shortage of one or the other vaccine, this provides a new way to use combinations of different vaccines,” said Dr Ahmed Al Hammadi, a consultant in infectious diseases at Tawam Hospital in Al Ain.

Sputnik V was approved for emergency use in the Emirates on January 21 after the country hosted a small-scale Phase 3 trial of the vaccine involving about 1,000 volunteers. The shot was produced by Gamaleya National Centre of Epidemiology and Microbiology.

Clinical trial data shows a 91.4 per cent efficacy for the Sputnik V vaccine 28 days after the first dose is administered and more than 95 per cent after 42 days.

Trials placed Sinopharm's efficacy at 79.34 per cent, but some experts said it could hold up better against variants than other vaccine types.

That is because it is derived from the whole virus and does not only target the spike protein, where the most concerning mutations have been found in the variants.

Most of the other vaccines currently in use all target the spike protein.

But medics are still examining how effective vaccines are against new strains, including the Sinopharm shot.

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