អ្នកស្រាវជ្រាវជនជាតិអ៊ីស្រាអែលនិយាយថា វ៉ាក់សាំងទី៤ ទំនងជាមិនគ្រប់គ្រាន់ទេ ដើម្បីការពារប្រឆាំងនឹង Omicron

Topline

A fourth Covid-19 vaccine dose may provide only limited protection against infection from the omicron variant, an Israeli researcher studying the shots said Monday based on preliminary findings, as a number of countries roll out the extra booster shots to at-risk groups.

ការពិតសំខាន់

While the fourth dose increased antibodies that protect against Covid-19 to a higher level than after three shots, it is “not good enough” to completely protect against an infection from the omicron variant, Prof. Gili Regev-Yochay, the director of Sheba Medical Center’s infectious disease unit and a lead researcher on the study, told reporters.

There were still “a lot of infections” of the omicron variant among those who received a fourth shot, though the number was slightly lower than among those who hadn’t gotten that extra dose, Regev-Yochay said, as reported by the ពេលវេលានៃជនជាតិអ៊ីស្រាអែល.

Regev-Yochay said it’s still “likely” a good idea to roll out fourth doses to those who are at the highest risk, the ពេលវេលានៃជនជាតិអ៊ីស្រាអែល reports, but suggested it may be better to only give older senior citizens the extra shot rather than everyone over age 60, as Israel is doing now.

Regev-Yochay did not release more specific data from the trial or comment on the fourth shot’s effectiveness against hospitalization or death against omicron, though the initial booster shots are highly protective against severe illness from the variant.

Sheba Medical Center’s study is based on 154 people who received four doses of the Pfizer/BioNTech vaccine and 120 people who received three Pfizer doses and one Moderna dose, Reuters reports, and the ពេលវេលានៃជនជាតិអ៊ីស្រាអែល notes it’s so far the only known study that’s come out on the fourth dose’s effects.

The findings are still preliminary and have not yet been published or peer reviewed.

សម្រង់សំខាន់

The increase in antibodies from the fourth shot “is probably not enough for the omicron [variant],” Regev-Yochay told reporters, as reported by Reuters. “We know by now that the level of antibodies needed to protect and not to get infected from omicron is probably too high for the vaccine, even if it’s a good vaccine.”

លេខធំ

More than 500,000. That’s how many Israelis have so far received a fourth vaccine dose, according to the ពេលវេលានៃជនជាតិអ៊ីស្រាអែល. Only immunocompromised residents, senior citizens and healthcare workers are so far eligible for the extra shot.

សាវតាសំខាន់

Israel became the first country to roll out fourth vaccine shots starting in late December, and several other countries including Chile and Denmark have since followed with their own plans to administer the extra doses. The fourth shots come in response to evidence suggesting the initial booster shot’s effectiveness wanes over time, with the U.K. Health Security Agency finding they’re often far less effective at preventing infections within 10 weeks. The countries’ fourth shot rollouts have taken place despite a lack of evidence regarding whether the shots are effective, and Pfizer CEO Albert Bourla said last week he still “[doesn’t] know whether there’s a need for them” since their effectiveness hasn’t been fully studied yet. Some experts had cautioned against Israel and other countries administering the extra shots as a result, with Israel Association of Public Health Physicians chairman Professor Hagai Levine telling the កាសែត New York Times in December, “Before giving a fourth shot, it is preferable to wait for the science.”

អ្វីដែលត្រូវមើល

Pfizer/BioNTech intends to have an updated version of their vaccine designed to protect against omicron ready in March. Bourla said during the J.P. Morgan Healthcare Conference last week it could be better to administer that than a fourth shot of the companies’ original vaccine, if the data bears that out.

តង់ហ្សង់។

West Virginia Gov. Jim Justice (R) said in early January the state would ask the Centers for Disease Control and Prevention to let them start administering fourth shots, given West Virginia’s particularly high vulnerable population. The CDC has so far resisted supporting extra booster doses, however, and director Dr. Rochelle Walensky said during a recent press briefing the agency’s “strategy has to be to maximize the protection of the tens of millions of people who continue to be eligible for a third shot before we start thinking about what a fourth shot would look like.” 

អានបន្ថែម

Israeli Study Shows 4th Shot of COVID-19 Vaccine Less Effective on Omicron (Reuters)

Israeli trial, world’s first, finds 4th dose ‘not good enough’ against Omicron (The Times of Israel)

Chile Latest Country To Roll Out 4th Covid Vaccine Shots — But Pfizer CEO Still Unsure Whether They’re Necessary (Forbes)

Denmark First In Europe To Offer 4th Covid Vaccine Dose (Forbes)

តើរដ្ឋនឹងផ្តល់វ៉ាក់សាំង Covid ទី 4 ដែរឬទេ? រដ្ឋ West Virginia ជាដំបូងដើម្បីសុំការអនុញ្ញាតពី CDC (Forbes)

ការធានារ៉ាប់រងពេញលេញនិងការធ្វើបច្ចុប្បន្នភាពផ្ទាល់លើវីរុសកូរ៉ូណាវ៉ាវី