BEIJING, July 27 — Antibodies triggered by Sinovac Biotech’s Covid-19 vaccine declined below a key threshold from around six months after a second dose for most recipients, but a third shot had a strong booster effect, a lab study showed. Chinese researchers reported the findings from a study...
channel for the latest updates.BEIJING, July 27 — Antibodies triggered by Sinovac Biotech’s Covid-19 vaccine declined below a key threshold from around six months after a second dose for most recipients, but a third shot had a strong booster effect, a lab study showed.
Chinese researchers reported the findings from a study of blood samples from healthy adults aged between 18-59 in apaperpublished on Sunday, which has not been peer reviewed. Among participants who received two doses, two or four weeks apart, only 16.9 per cent and 35.2 per cent respectively still had neutralising antibodies above what researchers regard as a detectable threshold level six months after the second shot, the paper said.
Those readings were based on data from two cohorts involving more than 50 participants each, while the study gave third doses of the vaccine or placebo to a total of 540 participants.Researchers said it was unclear how the decrease in antibodies would affect the shot’s effectiveness, since scientists have yet to figure out precisely the threshold of antibody levels for a vaccine to be able to prevent the disease. headtopics.com
Apart from durable antibodies, other components in humans immune systems such as T cells and B cell memory elicited by the vaccine may also contribute to protection, researchers involved in the study said, although the study did not provide data on those factors. “In the short-to-medium term, ensuring more people complete the current two-dose schedule of CoronaVac (Sinovac’s vaccine) should be the priority,” the paper said.
Participants in some cohorts who received a third dose of the Sinovac shot about six months after the second showed around a 3-5 fold increase in antibody levels after a further 28 days, compared with the levels seen four weeks after the second shot.As of end-June, Sinovac has delivered more than 1 billion doses of the vaccine, a major vaccination tool in China, Brazil, Indonesia and Chile.
Other Covid-19 vaccine makers are seeking to get authorisation for booster shots. Pfizer and partner BioNTech said earlier this month they had planned to ask US and European regulators within weeks to authorise a booster dose of its Covid-19 vaccine, based on evidence of greater risk of infection six months after inoculation and the spread of the highly contagious Delta variant.
Siti Nadia Tarmizi, a senior health ministry official in Indonesia, told Reuters today that clinical data from the country showed the reduced antibody level is still enough to provide protection, without providing details.She said the immunisation advisory board recommends a booster vaccination 12 months after the second dose. headtopics.com
Indonesia has started giving booster shots produced by Moderna to medical workers this month, including those who had received Sinovac doses.Philippines’ Health Secretary Francisco Duque said today there is no recommendation yet from the country’s vaccine expert panel on giving a booster shot but experts are discussing the possibility.
Turkey has already started offering a third dose from either Sinovac or Pfizer to some people who have got Sinovac shots.The research paper on Sinovac’s vaccine said that the study did not test the antibodies’ effect against more transmissible variants, and that further research was needed to assess antibody duration after a third shot.
The study was conducted by researchers at disease control authorities in Jiangsu province, Sinovac, and other Chinese institutions. — Reuters Read more: Malay Mail »
First batch of tourists arrives in Langkawi under travel bubble
LANGKAWI: Malaysia Airlines flight MH1432, carrying the first batch of fully-vaccinated tourists from Kuala Lumpur, landed safely at Langkawi International Airport here at about 10.40am on Thursday (Sept 16).
Seem like the cycle never stop. So? What's the plan? I am tired of stressing about getting Sinovac. I just want to know WHEN will we be getting the booster? Is it being discussed and planned or is this going to be ANOTHER FRIGGIN FAILURE! Study from who? Reuters and Pfizer? Stop carrying the same fake news as Reuters to smear sinovac.
Khairykj we need quick answer for this....since you are also vaccinated with sinovac .. Typical of China made product. Made not to last. So where's MadeInChina wumao now? ChinaLiedPeopleDied Typical MadeInChina where it stops working after 6 months. Reeks of marketing to create prolonged demand of a product. Without peer review, we can only take the study at face value. Anyway, common sense will tell any booster heightens the efficacy.
after 6mths Pharmaniaga earns booster shot profits from PN Gov, state Govts and Private Companies is it ? so for what PN Gov giving Msians and Non Msians Sinovac shots when it's a short stint Covid19 prevention? ANSWER Khairykj All vaccines are like that That makes it the safest since it be gone in six months. Can always have another should the need be..hihihi
Indonesia’s regional Covid-19 deaths higher than national tally, says data monitor | Malay MailJAKARTA, July 29 — Indonesia’s regional Covid-19 deaths vastly outnumber its national tally, an independent organisation which collects data on the Southeast Asian country’s coronavirus outbreak said in a statement today. Indonesia is Asia’s Covid-19 epicentre and has over the last week...
so one year 4 shots? since 2 shots only last 6 months.
Covid-19: Malaysia has started discussing securing more vaccine doses for booster shots, children, says KJPETALING JAYA: Malaysia has started discussions with pharmaceutical companies on possibly securing Covid-19 booster shots, as well as vaccines for children, by next year, says Khairy Jamaluddin.
Water skier Aaliyah down with Covid-19, withdraws from 2020 World Junior Meet 2020 | Malay MailKUALA LUMPUR, July 28 — Malaysian teenage water skier, Aaliyah Yoong Hanifah’s mission of slaying the World Junior Championship title has to be aborted after she tested positive for Covid-19 and decided to withdraw from the 2020 World Junior meet. Aaliyah, who is scheduled to compete in...
Thailand builds Covid-19 hospital in Bangkok airport amid surge in cases | Malay MailBANGKOK, July 28 — Thai volunteers today turned a cargo warehouse at Bangkok’s Don Muang Airport into a 1,800-bed field hospital for Covid-19 patients with less severe symptoms, as the country deals with its biggest outbreak to date. The Southeast Asian nation reported a daily record of 16,533...
UK Covid-19 cases fall again, deaths hit highest level since March | Malay MailLONDON, July 27 — Britain today recorded 23,511 Covid-19 cases, the seventh consecutive day with a lower total than the previous day, but 131 deaths were registered within 28 days of a positive test, the highest figure since March, according to official data. — Reuters
Cambodia to impose Covid-19 lockdowns in areas bordering Thailand | Malay MailPHNOM PENH, July 29 — Cambodia is set to launch a lockdown in eight provinces bordering Thailand from midnight on Thursday, in a bid to prevent the spread of the Delta variant of the coronavirus in the South-east Asian country. Prime Minister Hun Sen signed an order late on Wednesday for the...