*These summaries are not a systematic review. Each summary is provided by Covid Vaccines Thailand team comprised of a few clinicians and researchers intending mainly to support general population in Thailand with accessible platform to directly educate themselves or follow COVID-19 vaccines research knowledge from the original source of information with no marketing purposes. The summaries might not be in the exactly same format. Different persons summarize them under quality control. Please do not copy or edit this information to mislead the summaries with other intentions.
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Remark: According to the number of vaccination from the Department of Disease Control has been changed from per daily to per week, so CovidVacTH.com showed the number of vaccination per week as well.
Covid Vaccines Thailand Team
Following the advice of the Advisory Committee on Immunization Practice, approved by the National Infectious Diseases Committee and COVID-19 Emergency Operation Center (Updated 21 March 2022)
For those who have had a history of COVID-19 in the past, even if they are immune to the COVID-19 virus in their body, there is still a chance of re-infection. Therefore, they should always be vaccinated, even if they have had COVID-19 in the past, at least 3 months apart from infection There is no need to test for infection before vaccination because it cannot induce any harm from vaccination. It may be considered to inject only 1 dose because it can stimulate the immune system sufficiently.
The COVID-19 vaccine is a vaccine that has only been released for a short time and there is no information about giving this vaccine along with other vaccines. It is therefore advisable to have at least two weeks between the COVID-19 vaccine and other vaccines to avoid possible simultaneous vaccination reactions and the response interference to subsequent vaccines. The priority should be given to vaccination against COVID-19 before other vaccines. However, necessary vaccines such as rabies vaccines when bitten by an animal or tetanus vaccines when there is a wound should be given right away without having to pause a period. In cases where there is a high risk of contracting COVID-19, get vaccinated as soon as possible, regardless of a period to reduce the risk of severe diseases that must be considered more.
There are currently no study data on the effect of the COVID-19 vaccine on long-term immunity. Therefore, there are currently no recommendations.
Vaccines that are currently produced are developed from a virus that was initially epidemic. Therefore, this may cause the reduction in efficiency against mutant viruses. However, the effect of the mutant viruses on the effectiveness of each vaccine requires further study. It is possible that vaccinations against the mutated virus will be needed in the future.
Vaccinations may not prevent all infections, but it can prevent most severe symptoms of the disease. Therefore, those who have been vaccinated may become asymptomatic or have very few symptoms. So, after vaccination, it is necessary to maintain measures to prevent infection in the community, such as wearing a mask, keeping physical distance, avoiding going to crowded places and continuing to wash your hands frequently. Until there is certainty that most or almost all the people in the community have immunity to the disease, the measures cannot be reduced. The Ministry of Public Health will continue to advise.
The interval between the 1st and 2nd doses of Sinovac’s COVID-19 vaccine is 2-4 weeks. For the AstraZeneca vaccine, the interval is 10-12 weeks, and up to 16 weeks if necessary. If those who are delayed receiving the vaccine, they should ask the staff to follow up to receive the 2nd Covid-19 vaccine as soon as possible. There is no need to restart the injection.
Numbness, weakness, or other nervous system-like symptoms that are temporary without any pathologies and are recovered are not a contraindication to the second dose of the same vaccine. If the symptoms are severe and worrying, the type of vaccine should be changed in the second dose.
The Sinovac vaccine can be given instead at the interval of 10-16 weeks (depending on the distance between AstraZeneca Vaccine 1st and 2nd). The gap between the 2nd dose and the 1st dose in case of changing the type of vaccine should be based on the type of vaccine administered as the 1st dose.
No revaccination or treatment is required but watch for the symptoms and counting the vaccination continuously.
The second dose should be given, but the type of vaccine should be changed if there is a severe reaction in the first dose.
For those who have had a history of COVID-19, even if they have immunity to COVID-19 in their body, there is currently no information on how long the immune system will last to prevent infection with the COVID-19 for next time. There is still have a chance of re-infection. Therefore, they should always be vaccinated against COVID-19, even if they have had COVID-19 in the past, at least 3-6 months apart from infection. There is no need to test for infection before vaccination because it cannot induce any harm from vaccination. It may be considered to inject only 1 dose because it can stimulate the immune system sufficiently.
If they have any questions about the use of “Mor Prom”, they can contact the Mor Prom Contact Center at 0-2792-2333.