📚 Journal of Hygiene Articles (2) Coronavirus antibody titres in sera of healthy adults and experimentally infected volunteers 👤 Bradburne, A. F. 👤 Somerset, B. A. ⏰ 1972 📚 Journal of Hygiene Effect of specific humoral immunity and some non-specific factors on resistance of volunteers to respiratory coronavirus infection 👤 Callow, Kathleen A. ⏰ 1985 📚 Journal of Hygiene