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. 1975;52(3):307–311.

The minimum protective level of antibodies in smallpox*

J K Sarkar, A C Mitra, M K Mukherjee
PMCID: PMC2366379  PMID: 1084801

Abstract

Blood samples from 57 contacts of 6 smallpox cases were tested for haemagglutination-inhibiting (HI) and neutralizing antibodies. All 6 contacts who subsequently developed smallpox were unvaccinated and had neutralizing antibody titres of 10 or less. However, 6 unvaccinated contacts with similar antibody levels did not develop smallpox. None of the 41 vaccinated contacts, regardless of their antibody level, contracted the disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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