“This helps to make the vaccine more effective. Although aluminium can cause greater redness or swelling at the injection site, the tiny amount of aluminium salts in vaccines has no long-term effect on the body and has been safely used in some vaccines since the 1930s.
“Also amounts of formaldehyde can be found, used to inactivate potential contamination, may also be present in some vaccines.
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“This may sound worrying, but the dose of formaldehyde is 100s of times less than what we get from other sources, such as fruit. So, really it isn’t a valid concern.”
One key concern from researchers when it comes to vaccines, however, is whether or not they will provide long-term protection.
Source: Daily Express
