{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:F6PZI2JO7Q5TIDFFJXOUWXCOOH","short_pith_number":"pith:F6PZI2JO","canonical_record":{"source":{"id":"2203.07063","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"q-bio.PE","submitted_at":"2022-03-11T14:59:21Z","cross_cats_sorted":["q-bio.QM"],"title_canon_sha256":"f8c151e5c5104602b9ca9de8615de9eb66d51f22480a5af787899fae7e4f2992","abstract_canon_sha256":"62bbd59964cbedcc28036176b584c8436236c1853423291b9cf9e1e55c1c00e7"},"schema_version":"1.0"},"canonical_sha256":"2f9f94692efc3b340ca54ddd4b5c4e71ce3cab7c1a761c8edb42335a3e740fe6","source":{"kind":"arxiv","id":"2203.07063","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.07063","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"arxiv_version","alias_value":"2203.07063v1","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.07063","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"pith_short_12","alias_value":"F6PZI2JO7Q5T","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"pith_short_16","alias_value":"F6PZI2JO7Q5TIDFF","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"pith_short_8","alias_value":"F6PZI2JO","created_at":"2026-07-05T04:04:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:F6PZI2JO7Q5TIDFFJXOUWXCOOH","target":"record","payload":{"canonical_record":{"source":{"id":"2203.07063","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"q-bio.PE","submitted_at":"2022-03-11T14:59:21Z","cross_cats_sorted":["q-bio.QM"],"title_canon_sha256":"f8c151e5c5104602b9ca9de8615de9eb66d51f22480a5af787899fae7e4f2992","abstract_canon_sha256":"62bbd59964cbedcc28036176b584c8436236c1853423291b9cf9e1e55c1c00e7"},"schema_version":"1.0"},"canonical_sha256":"2f9f94692efc3b340ca54ddd4b5c4e71ce3cab7c1a761c8edb42335a3e740fe6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:04:58.939458Z","signature_b64":"ZtrVpJ8UxQafK7FQ+bctpCypPPPpQPFnb2w+lxIwDcIYbcOSUaOFARxF5s8kO0gvnFcFwyX9TAhuM6/3KRo/AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2f9f94692efc3b340ca54ddd4b5c4e71ce3cab7c1a761c8edb42335a3e740fe6","last_reissued_at":"2026-07-05T04:04:58.939007Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:04:58.939007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2203.07063","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:04:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LUn1Ni5Zp6N0oK1Mc8Rm+aN6wQTxLKSoaV2UzoHuFPSOiXHYE17FZ2FQ+TnxtvU1HEk97YejDRQKP/Sy27rBBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T20:22:05.281841Z"},"content_sha256":"a86736f4c703ab7f1e60150b9709ad5f56badeb69a6be256f6173f395d0ed84c","schema_version":"1.0","event_id":"sha256:a86736f4c703ab7f1e60150b9709ad5f56badeb69a6be256f6173f395d0ed84c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:F6PZI2JO7Q5TIDFFJXOUWXCOOH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Estimation of the incubation period and generation time of SARS-CoV-2 Alpha and Delta variants from contact tracing data","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["q-bio.QM"],"primary_cat":"q-bio.PE","authors_text":"Agnese Zardini, Alfredo De Bellis, Ana I. Bento, Antonino Bella, Eufemia Bisaccia, Filippo Trentini, Flavia Riccardo, Francesco Venturelli, Giorgio Guzzetta, Marco Ajelli, Maria Litvinova, Massimo Vicentini, Mattia Manica, Pamela Mancuso, Paolo Giorgi Rossi, Patrizio Pezzotti, Piero Poletti, Stefano Merler, the Reggio Emilia COVID-19 Working Group, Valentina Marziano, Valeria d'Andrea","submitted_at":"2022-03-11T14:59:21Z","abstract_excerpt":"Background. During 2021, the COVID-19 pandemic was characterized by the emergence of lineages with increased fitness. For most of these variants, quantitative information is scarce on epidemiological quantities such as the incubation period and generation time, which are critical for both public health decisions and scientific research. Method. We analyzed a dataset collected during contact tracing activities in the province of Reggio Emilia, Italy, throughout 2021. We determined the distributions of the incubation period using information on negative PCR tests and the date of last exposure fr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.07063","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2203.07063/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:04:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ju0TRvK3ynDdbJzR28cAAZG6P7tLLk/uBlIAZhbjHlhMMxHBVSH7Z7d7xBlcVuOYjA7mhhBYK3TfW+PDVqVrDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-14T20:22:05.282214Z"},"content_sha256":"e6a439b3acd131b6072b38ade533ab35de502ef7b3e703affc66f5939ad7059d","schema_version":"1.0","event_id":"sha256:e6a439b3acd131b6072b38ade533ab35de502ef7b3e703affc66f5939ad7059d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH/bundle.json","state_url":"https://pith.science/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-14T20:22:05Z","links":{"resolver":"https://pith.science/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH","bundle":"https://pith.science/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH/bundle.json","state":"https://pith.science/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F6PZI2JO7Q5TIDFFJXOUWXCOOH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:F6PZI2JO7Q5TIDFFJXOUWXCOOH","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"62bbd59964cbedcc28036176b584c8436236c1853423291b9cf9e1e55c1c00e7","cross_cats_sorted":["q-bio.QM"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"q-bio.PE","submitted_at":"2022-03-11T14:59:21Z","title_canon_sha256":"f8c151e5c5104602b9ca9de8615de9eb66d51f22480a5af787899fae7e4f2992"},"schema_version":"1.0","source":{"id":"2203.07063","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2203.07063","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"arxiv_version","alias_value":"2203.07063v1","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.07063","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"pith_short_12","alias_value":"F6PZI2JO7Q5T","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"pith_short_16","alias_value":"F6PZI2JO7Q5TIDFF","created_at":"2026-07-05T04:04:58Z"},{"alias_kind":"pith_short_8","alias_value":"F6PZI2JO","created_at":"2026-07-05T04:04:58Z"}],"graph_snapshots":[{"event_id":"sha256:e6a439b3acd131b6072b38ade533ab35de502ef7b3e703affc66f5939ad7059d","target":"graph","created_at":"2026-07-05T04:04:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2203.07063/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Background. During 2021, the COVID-19 pandemic was characterized by the emergence of lineages with increased fitness. For most of these variants, quantitative information is scarce on epidemiological quantities such as the incubation period and generation time, which are critical for both public health decisions and scientific research. Method. We analyzed a dataset collected during contact tracing activities in the province of Reggio Emilia, Italy, throughout 2021. We determined the distributions of the incubation period using information on negative PCR tests and the date of last exposure fr","authors_text":"Agnese Zardini, Alfredo De Bellis, Ana I. Bento, Antonino Bella, Eufemia Bisaccia, Filippo Trentini, Flavia Riccardo, Francesco Venturelli, Giorgio Guzzetta, Marco Ajelli, Maria Litvinova, Massimo Vicentini, Mattia Manica, Pamela Mancuso, Paolo Giorgi Rossi, Patrizio Pezzotti, Piero Poletti, Stefano Merler, the Reggio Emilia COVID-19 Working Group, Valentina Marziano, Valeria d'Andrea","cross_cats":["q-bio.QM"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"q-bio.PE","submitted_at":"2022-03-11T14:59:21Z","title":"Estimation of the incubation period and generation time of SARS-CoV-2 Alpha and Delta variants from contact tracing data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.07063","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:a86736f4c703ab7f1e60150b9709ad5f56badeb69a6be256f6173f395d0ed84c","target":"record","created_at":"2026-07-05T04:04:58Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"62bbd59964cbedcc28036176b584c8436236c1853423291b9cf9e1e55c1c00e7","cross_cats_sorted":["q-bio.QM"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"q-bio.PE","submitted_at":"2022-03-11T14:59:21Z","title_canon_sha256":"f8c151e5c5104602b9ca9de8615de9eb66d51f22480a5af787899fae7e4f2992"},"schema_version":"1.0","source":{"id":"2203.07063","kind":"arxiv","version":1}},"canonical_sha256":"2f9f94692efc3b340ca54ddd4b5c4e71ce3cab7c1a761c8edb42335a3e740fe6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2f9f94692efc3b340ca54ddd4b5c4e71ce3cab7c1a761c8edb42335a3e740fe6","first_computed_at":"2026-07-05T04:04:58.939007Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:04:58.939007Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZtrVpJ8UxQafK7FQ+bctpCypPPPpQPFnb2w+lxIwDcIYbcOSUaOFARxF5s8kO0gvnFcFwyX9TAhuM6/3KRo/AA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:04:58.939458Z","signed_message":"canonical_sha256_bytes"},"source_id":"2203.07063","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a86736f4c703ab7f1e60150b9709ad5f56badeb69a6be256f6173f395d0ed84c","sha256:e6a439b3acd131b6072b38ade533ab35de502ef7b3e703affc66f5939ad7059d"],"state_sha256":"b69c4267c64f1b6265f2c43f0cf31401f7225cd0a1dd153ba95d6047b24e2180"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mQepmtzWHGYHO6X4tA/T8wjHwNZ17kd51EvPN37Euy1VmpStE60VujY7YHd55P5pzT5Ywd1PMZBXUeDGR/wKDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-14T20:22:05.286534Z","bundle_sha256":"89659a2fa19bba454298f21e4a6cce361fa178f71387dc067301153a15d37732"}}