Do you get any protection from an incomplete vaccine series?

score:4

Accepted answer

You could hardly be better.

According to Canadian public health agency, 95-100% of patients produce antibodies after 1 shot of Hepatitis A, nearly 100% after two shots.

Though, this does not mean you are nearly 100% immune after two shots

Immunogenicity

In serologic studies of HA vaccines, 95% to 100% of vaccinees developed protective concentrations of antibody against HA after a single dose of HA vaccine, and nearly 100% seroconverted after receiving two doses.

There is no reduction, and possibly even an increase, in seroprotection rates achieved by HAHB vaccine compared with monovalent HA and HB vaccines. Equivalent seroconversion rates are achieved by HA-Typh-I vaccine compared with typhoid and monovalent HA vaccines.

Source: http://www.phac-aspc.gc.ca/publicat/cig-gci/p04-hepa-eng.php#a3

Disclaimer: This is no medical advice and you should consult an authorized practitioner.

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