Merge pull request #734 from cmu-delphi/cmelucci/special-feature-udpate

Update link to PNAS special feature

Author: christymelucci

content/about/news/headless/2021_12_14_pnas.md

@@ -5,7 +5,7 @@ category: update
 image: 2021-12-14-pnas-thumb.jpg
 ---
 
-The Proceedings of the National Academy of Sciences Special Feature, ["Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams In Tracking the COVID-19 Pandemic"](https://www.pnas.org/content/118/51#BeyondCasesandDeathsTheBenefitsofAuxiliaryDataStreamsInTrackingtheCOVID-19Pandemic), highlights Delphi papers, including:
+The Proceedings of the National Academy of Sciences Special Feature, ["Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams In Tracking the COVID-19 Pandemic"](https://www.pnas.org/topic/548), highlights Delphi papers, including:
 
  - [Epidemic Tracking and Forecasting: Lessons Learned from a Tumultuous Year](https://www.pnas.org/content/118/51/e2111456118)
  - [An Open Repository of Real-Time COVID-19 Indicators](https://doi.org/10.1073/pnas.2111452118)

content/covid19/_index.md

@@ -52,7 +52,7 @@ in the United States. It has several parts.
 
 A summary of some key parts of COVIDcast can be found in the December 2021 *Proceedings of the National Academy of Sciences*
 Special Feature: [Beyond cases and deaths: The benefits of auxiliary data
-streams in tracking the COVID-19 pandemic](https://www.pnas.org/cc/beyond-cases-and-deaths):
+streams in tracking the COVID-19 pandemic](https://www.pnas.org/topic/548):
 
 - [Epidemic tracking and forecasting: Lessons learned from a tumultuous
   year](https://www.pnas.org/content/118/51/e2111456118?cct=2522)

content/covid19/ctis.md

@@ -47,7 +47,7 @@ The [Symptom Data Challenge](https://www.symptomchallenge.org/) challenged parti
 
 ### Publications
 
-Our primary description of the survey and its results over the first year of operation was published as part of the [special feature "Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams in Tracking the COVID-19 Pandemic"](https://www.pnas.org/doi/full/10.1073/pnas.2111456118) in *PNAS*:
+Our primary description of the survey and its results over the first year of operation was published as part of the [special feature "Beyond Cases and Deaths: The Benefits of Auxiliary Data Streams in Tracking the COVID-19 Pandemic"](https://www.pnas.org/topic/548) in *PNAS*:
 
 - J. Salomon, A. Reinhart, A. Bilinski, E. J. Chua, W. La Motte-Kerr, M. M.
   Rönn, M. B. Reitsma, K. A. Morris, S. LaRocca, T. H. Farag, F. Kreuter, R.