<commit_before>        ---
title: Signal Changelog
parent: COVIDcast API
nav_order: 3
---

# COVIDcast Signal Changelog

When Delphi makes substantial changes to the computation of a signal, we will
typically publish it under a new name rather than revising the existing signal.
By contrast, the changes documented here are bug fixes, pipeline repairs, and
minor enhancements.

Changes are also announced via the [COVIDcast API mailing
list](https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api), and
we **strongly recommend** that anyone using the API to regularly download data
should subscribe to this list. The list will only be used to announce API
changes, data corrections, and other information relevant to API users.

## Table of contents
{: .no_toc .text-delta}

1. TOC
{:toc}

## Sources and Signals
### `doctor-visits`
### `fb-survey`

#### 3 June 2020

Duplicate survey weights had corrupted historical figures for the following signals and dates. The correct data has been restored to the API.
* `raw_wcli`
  * `county`: 20200406, 20200408, 20200410, 20200430
  * `hrr`: 20200406, 20200408-20200410, 20200430
  * `msa`: 20200408, 20200410, 20200430
  * `state`: 20200408-20200410, 20200430
* `smoothed_wcli`
  * `county`: 20200406, 20200408-20200414, 20200430-20200506
  * `hrr`: 20200406-20200415, 20200430-20200506
  * `msa`: 20200408-20200414, 20200430-20200506
  * `state`: 20200408-20200416, 20200430-20200506

### `google-survey`
### `ght`
<commit_msg>Update covidcast_changelog.md<commit_after>        ---
title: Signal Changelog
parent: COVIDcast API
nav_order: 3
---

# COVIDcast Signal Changelog

When Delphi makes substantial changes to the computation of a signal, we will
typically publish it under a new name rather than revising the existing signal.
By contrast, the changes documented here are bug fixes, pipeline repairs, and
minor enhancements.

Changes are also announced via the [COVIDcast API mailing
list](https://lists.andrew.cmu.edu/mailman/listinfo/delphi-covidcast-api), and
we **strongly recommend** that anyone using the API to regularly download data
should subscribe to this list. The list will only be used to announce API
changes, data corrections, and other information relevant to API users.

## Table of contents
{: .no_toc .text-delta}

1. TOC
{:toc}

## Sources and Signals
### `doctor-visits`
### `fb-survey`

#### 3 June 2020

Duplicate survey weights had corrupted historical figures for the following signals and dates. The correct data has been restored to the API.
* `raw_wcli`
  * `county`: 20200406, 20200408, 20200410, 20200430
  * `hrr`: 20200406, 20200408-20200410, 20200430
  * `msa`: 20200408, 20200410, 20200430
  * `state`: 20200408-20200410, 20200430
* `smoothed_wcli`
  * `county`: 20200406, 20200408-20200414, 20200430-20200506
  * `hrr`: 20200406-20200415, 20200430-20200506
  * `msa`: 20200408-20200414, 20200430-20200506
  * `state`: 20200408-20200416, 20200430-20200506
  
#### 20 November 2020  

Due to a bug in our data processing system, estimates of the percentage of people reporting that they have been tested for COVID-19 calculated before October 8th were incorrect. 
We incorrectly treated an answer of “no” as a missing response, which affected the smoothed_tested_14d and smoothed_wtested_14d signals from the fb-survey source. 

As of Nov. 20th, the error has been corrected and all affected data reissued. 


### `google-survey`
### `ght`

{'fraction_non_alphanumeric': 0.09011627906976744, 'fraction_numerical': 0.15261627906976744, 'mean_word_length': 4.613376835236542, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 2, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 2, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '1186478', 'n_tokens_mistral': 1492, 'n_tokens_neox': 1062, 'n_words': 409}