Subcutaneous injection of lower doses of COVID-19 vaccine generates a lower immune response than intramuscular injection, but produces fewer undesirable side effects, according to the findings of a research study by the Siriraj Institute of Clinical Research at Siriraj Hospital.

 

The research centre disclosed the findings today (Tuesday) of the vaccination program conducted on 210 people aged 65 years old and over, who had received two AstraZeneca vaccine shots and were given a booster dose of either Pfizer or Moderna vaccines. Subcutaneous and intramuscular injections were used on two separate groups.

 

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One-fifth of a dose of vaccine was administered in cases of subcutaneous injection, compared to full doses for intramuscular injection.

 

Full story: https://www.thaipbsworld.com/subcutaneous-vaccine-jabs-offer-less-protection-but-fewer-side-effects-thai-study/

 

-- © Copyright Thai PBS 2022-05-10

 

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The side effects you get are from your body thinking it has an infection.  So of course a less effective vaccine will have less side effects.

...regardless of intra-muscular or subcutaneous injections; the vaccine is absorbed by the lymphatic system and not bloodstream; hence the practice of 'pulling back' before delivering the dose. The length of needle should be different for either method; however non of this was staed, and i have no idea whether it is an Open View paper! Any nursing professional care to comment?

 

19 hours ago, webfact said:

Subcutaneous injection of lower doses of COVID-19 vaccine generates a lower immune response than intramuscular injection, but produces fewer undesirable side effects, according to the findings of a research study by the Siriraj Institute of Clinical Research at Siriraj Hospital

Amazing findings... go Thailand.

36 minutes ago, tandor said:

hence the practice of 'pulling back' before delivering the dose.

I've practiced that many times...