By July 5, we were able to declare that all chains of person-to-person transmission had been broken and that the outbreak had been contained.
Chains of person-to-person transmission can likely be terminated, provided no reservoir of asymptomatic carriers, chronic infection, or seeding of new settings (e.g., Africa) exists.
Nevertheless, the data analysed are consistent with limited chains of person-to-person transmission, a phenomenon observed in the Netherlands during an H7N7 outbreak in 2003 [ 11, 12].
With more data on transmission events – including chains of person-to-person infection – it would be possible to further investigate the role of exposure in the natural history of Ebola infection.
About 80% of the children in a given region must be fully immunized against polio in order to stop the chain of person-to-person transmission.
Crucial measures that have broken the chain of person-to-person transmission of the SARS virus are the detection and treatment of suspected cases as soon as they are identified and then quarantining their contacts.
Because the reproduction number did not fall below the threshold value of 1, implementation of the hygiene measures was not sufficient to effectively break the chain of person-to-person transmission of norovirus during this outbreak.
Ebola virus has also been implicated in small chains of transmission among persons with direct contact with intermediary hosts, mostly nonhuman primates in the central African countries of Gabon and Republic of the Congo.
Almost every scene was set in a therapy session — Paul's with a patient, and Paul's session with his confidant and former supervisor Gina (Dianne Wiest) — essentially a chain of two-person, one-act plays without action, sets or pop-music cues.
These captive feeder mice had a wide and complex distribution chain, potentially exposing thousands of persons to LCMV.
