Documentation for survey item C14a

Author: nmdefries

docs/api/covidcast-signals/fb-survey.md

@@ -288,6 +288,7 @@ data in the estimation procedures described above.
 | Signal | Description | Survey Item | Introduced |
 | --- | --- | --- | --- |
 | `smoothed_wearing_mask` | Estimated percentage of people who wore a mask for most or all of the time while in public in the past 5 days; those not in public in the past 5 days are not counted. <br/> **Earliest date available:** 2020-09-08 | C14 | Wave 4, Sept 8, 2020 |
+| `smoothed_wearing_mask_7d` | Estimated percentage of people who wore a mask for most or all of the time while in public in the past 7 days; those not in public in the past 7 days are not counted. <br/> **Earliest date available:** 2021-02-08 | C14a | Wave 8, Feb 8, 2021 |
 | `smoothed_others_masked` | Estimated percentage of respondents who say that most or all *other* people wear masks, when they are in public and social distancing is not possible <br/> **Earliest date available:** 2020-11-24 | C16 | Wave 5, Nov 24, 2020 |
 | `smoothed_travel_outside_state_5d` | Estimated percentage of respondents who report traveling outside their state in the past 5 days <br/> **Earliest date available:** 2020-04-06 | C6 | Wave 1 |
 | `smoothed_work_outside_home_1d` | Estimated percentage of respondents who worked or went to school outside their home in the past 24 hours <br/> **Earliest date available:** 2020-09-08 | C13 | Wave 4, Sept 8, 2020 |

docs/symptom-survey/coding.md

@@ -479,3 +479,5 @@ new items were meant to capture reasons for vaccine hesitancy among respondents.
 * Item D1b was previously removed in wave 4 and asks respondents that identify
   as not male if they are currently pregnant.
 * Item D11 ask respondents if they smoke cigarettes.
+* Item C14a asks “In the past 7 days, how often did you wear a mask when in
+  public?”, replacing item C14, which asked only about the past 5 days.