Thailand

Booster shots likely needed, expert says

Booster shots likely needed, expert says

Immune response weakens over time

A woman reacts to a Covid-10 vaccine jab delivered by a nurse from City Hall’s public health office on April 12. The jabs were given to vendors in the Bang Khae market area and residents around Wat Nimman Noradee School in Phasicharoen district. (Photo: Pattarapong Chatpattarasill)
A woman reacts to a Covid-10 vaccine jab delivered by a nurse from City Hall’s public health office on April 12. The jabs were given to vendors in the Bang Khae market area and residents around Wat Nimman Noradee School in Phasicharoen district. (Photo: Pattarapong Chatpattarasill)

Individuals who have been fully vaccinated against Covid-19, as well as those who have fully recovered against the disease, are likely to need booster shots to maintain sufficient protection against reinfection, a virus expert is warning.

Yong Poovorawan, head of the Centre of Excellence in Clinical Virology of Chulalongkorn University, said in a Facebook post on Monday that a study into recovered patients suggested that immunity against Covid-19 begins to decrease around three to six months after being infected.

According to Dr Yong, a virus' incubation period plays a significant role in determining the effectiveness of a vaccine, which generally works better against vaccines with long incubation periods, such as measles and chicken pox.

However, similar to influenza, Covid-19 has a short incubation period at 2-7 days. As such, to maintain immunity against the disease, booster shots will be needed, he said.

The expert also warned that those who have been vaccinated, or acquired immunity against Covid-19 as a result of prior infections, can still be reinfected, although the symptoms in subsequent infections tend to be less severe.

"It is highly likely that a third dose of the Covid-19 vaccine will be needed and it is possible that people will need to get vaccinated against the coronavirus periodically," he wrote.

He said that the nation's inoculation programme is a must-do because vaccines are highly effective at preventing people from being hospitalised or dying from their symptoms.

According to the Centre for Covid-19 Situation Administration (CCSA), a total of 618,583 people received Covid-19 vaccines between Feb 28-April 18. On Sunday, 9,219 people received their first dose, while and 843 received their second dose.

Meanwhile, Sonthiya Sawasdee, adviser to the House committee on law, justice and human rights, on Monday filed a complaint with Technology Crime Suppression Division (TCSD) against Arunee Kasayanont, spokeswoman for the opposition Pheu Thai Party, over her comments on Saturday about the AstraZeneca vaccine.

He said Ms Arunee also allegedly posted part of her remarks on Facebook which can incorrectly lead the public to believe the vaccine is not effective.

Mr Sonthiya focused on her comment, "other people's trash is our treasure", which he said can affect public confidence in the vaccine.

Football news:

Griezmann spoke with Hamilton and visited the Mercedes boxes at the Spanish Grand Prix
Barcelona feels that Neymar used it. He said that he wanted to return, but extended his contract with PSG (RAC1)
Aubameyang to the Arsenal fans: We wanted to give you something good. I am sorry that we could not
Atletico did not lose at the Camp Nou. Busquets' injury is the turning point of the match (and the championship race?)
Verratti injured his knee ligaments in PSG training. Participation in the Euro is still in question
Neymar's contract in one picture. Mbappe wants the same one
Manchester United would like to sign Bellingham in the summer, not Sancho. Borussia do not intend to sell Jude