diff --git a/environment.yml b/environment.yml
new file mode 100644
index 0000000..64fb17a
--- /dev/null
+++ b/environment.yml
@@ -0,0 +1,173 @@
+name: covid19
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - _libgcc_mutex=0.1=main
+  - asn1crypto=1.3.0=py37_0
+  - attrs=19.3.0=py_0
+  - autopep8=1.4.4=py_0
+  - backcall=0.1.0=py37_0
+  - beautifulsoup4=4.8.2=py37_0
+  - blas=1.0=mkl
+  - bleach=3.1.0=py37_0
+  - bzip2=1.0.8=h7b6447c_0
+  - ca-certificates=2020.1.1=0
+  - cairo=1.14.12=h8948797_3
+  - certifi=2019.11.28=py37_0
+  - cffi=1.14.0=py37h2e261b9_0
+  - chardet=3.0.4=py37_1003
+  - click=7.0=py37_0
+  - click-plugins=1.1.1=py_0
+  - cligj=0.5.0=py37_0
+  - cryptography=2.8=py37h1ba5d50_0
+  - curl=7.67.0=hbc83047_0
+  - cycler=0.10.0=py37_0
+  - dbus=1.13.12=h746ee38_0
+  - decorator=4.4.2=py_0
+  - defusedxml=0.6.0=py_0
+  - descartes=1.1.0=py_3
+  - entrypoints=0.3=py37_0
+  - expat=2.2.6=he6710b0_0
+  - fiona=1.8.4=py37hc38cc03_0
+  - fontconfig=2.13.0=h9420a91_0
+  - freetype=2.9.1=h8a8886c_1
+  - freexl=1.0.5=h14c3975_0
+  - gdal=2.3.3=py37hbb2a789_0
+  - geopandas=0.6.1=py_0
+  - geos=3.7.1=he6710b0_0
+  - giflib=5.1.4=h14c3975_1
+  - glib=2.63.1=h5a9c865_0
+  - gmp=6.1.2=h6c8ec71_1
+  - gst-plugins-base=1.14.0=hbbd80ab_1
+  - gstreamer=1.14.0=hb453b48_1
+  - hdf4=4.2.13=h3ca952b_2
+  - hdf5=1.10.4=hb1b8bf9_0
+  - icu=58.2=h9c2bf20_1
+  - idna=2.8=py37_0
+  - importlib_metadata=1.5.0=py37_0
+  - intel-openmp=2020.0=166
+  - ipykernel=5.1.4=py37h39e3cac_0
+  - ipython=7.13.0=py37h5ca1d4c_0
+  - ipython_genutils=0.2.0=py37_0
+  - ipywidgets=7.5.1=py_0
+  - jedi=0.16.0=py37_0
+  - jinja2=2.11.1=py_0
+  - jpeg=9b=h024ee3a_2
+  - json-c=0.13.1=h1bed415_0
+  - jsonschema=3.2.0=py37_0
+  - jupyter=1.0.0=py37_7
+  - jupyter_client=5.3.4=py37_0
+  - jupyter_console=6.1.0=py_0
+  - jupyter_contrib_core=0.3.3=py_2
+  - jupyter_contrib_nbextensions=0.5.1=py37_0
+  - jupyter_core=4.6.1=py37_0
+  - jupyter_highlight_selected_word=0.2.0=py37_1000
+  - jupyter_latex_envs=1.4.4=py37_1000
+  - jupyter_nbextensions_configurator=0.4.1=py37_0
+  - kealib=1.4.7=hd0c454d_6
+  - kiwisolver=1.1.0=py37he6710b0_0
+  - krb5=1.16.4=h173b8e3_0
+  - ld_impl_linux-64=2.33.1=h53a641e_7
+  - libboost=1.67.0=h46d08c1_4
+  - libcurl=7.67.0=h20c2e04_0
+  - libdap4=3.19.1=h6ec2957_0
+  - libedit=3.1.20181209=hc058e9b_0
+  - libffi=3.2.1=hd88cf55_4
+  - libgcc-ng=9.1.0=hdf63c60_0
+  - libgdal=2.3.3=h2e7e64b_0
+  - libgfortran-ng=7.3.0=hdf63c60_0
+  - libkml=1.3.0=h590aaf7_4
+  - libnetcdf=4.6.1=h11d0813_2
+  - libpng=1.6.37=hbc83047_0
+  - libpq=11.2=h20c2e04_0
+  - libsodium=1.0.16=h1bed415_0
+  - libspatialindex=1.9.3=he6710b0_0
+  - libspatialite=4.3.0a=hb08deb6_19
+  - libssh2=1.9.0=h1ba5d50_1
+  - libstdcxx-ng=9.1.0=hdf63c60_0
+  - libtiff=4.1.0=h2733197_0
+  - libuuid=1.0.3=h1bed415_2
+  - libxcb=1.13=h1bed415_1
+  - libxml2=2.9.9=hea5a465_1
+  - libxslt=1.1.33=h7d1a2b0_0
+  - lxml=4.5.0=py37hefd8a0e_0
+  - markupsafe=1.1.1=py37h7b6447c_0
+  - matplotlib=3.1.3=py37_0
+  - matplotlib-base=3.1.3=py37hef1b27d_0
+  - mistune=0.8.4=py37h7b6447c_0
+  - mkl=2020.0=166
+  - mkl-service=2.3.0=py37he904b0f_0
+  - mkl_fft=1.0.15=py37ha843d7b_0
+  - mkl_random=1.1.0=py37hd6b4f25_0
+  - munch=2.5.0=py_0
+  - nbconvert=5.6.1=py37_0
+  - nbformat=5.0.4=py_0
+  - ncurses=6.2=he6710b0_0
+  - notebook=6.0.3=py37_0
+  - numpy=1.18.1=py37h4f9e942_0
+  - numpy-base=1.18.1=py37hde5b4d6_1
+  - openjpeg=2.3.0=h05c96fa_1
+  - openssl=1.1.1d=h7b6447c_4
+  - pandas=1.0.1=py37h0573a6f_0
+  - pandoc=2.2.3.2=0
+  - pandocfilters=1.4.2=py37_1
+  - parso=0.6.1=py_0
+  - pcre=8.43=he6710b0_0
+  - pexpect=4.8.0=py37_0
+  - pickleshare=0.7.5=py37_0
+  - pip=20.0.2=py37_1
+  - pixman=0.38.0=h7b6447c_0
+  - poppler=0.65.0=h581218d_1
+  - poppler-data=0.4.9=0
+  - proj4=5.2.0=he6710b0_1
+  - prometheus_client=0.7.1=py_0
+  - prompt_toolkit=3.0.3=py_0
+  - ptyprocess=0.6.0=py37_0
+  - pycodestyle=2.5.0=py37_0
+  - pycparser=2.19=py37_0
+  - pygments=2.5.2=py_0
+  - pyopenssl=19.1.0=py37_0
+  - pyparsing=2.4.6=py_0
+  - pyproj=1.9.6=py37h14380d9_0
+  - pyqt=5.9.2=py37h05f1152_2
+  - pyrsistent=0.15.7=py37h7b6447c_0
+  - pysocks=1.7.1=py37_0
+  - python=3.7.6=h0371630_2
+  - python-dateutil=2.8.1=py_0
+  - python_abi=3.7=1_cp37m
+  - pytz=2019.3=py_0
+  - pyyaml=5.3=py37h8f50634_1
+  - pyzmq=18.1.1=py37he6710b0_0
+  - qt=5.9.7=h5867ecd_1
+  - qtconsole=4.7.1=py_0
+  - qtpy=1.9.0=py_0
+  - readline=7.0=h7b6447c_5
+  - requests=2.23.0=py37_0
+  - rtree=0.9.3=py37_0
+  - send2trash=1.5.0=py37_0
+  - setuptools=46.0.0=py37_0
+  - shapely=1.6.4=py37h86c5351_0
+  - sip=4.19.8=py37hf484d3e_0
+  - six=1.14.0=py37_0
+  - soupsieve=1.9.5=py37_0
+  - sqlite=3.31.1=h7b6447c_0
+  - terminado=0.8.3=py37_0
+  - testpath=0.4.4=py_0
+  - tk=8.6.8=hbc83047_0
+  - tornado=6.0.4=py37h7b6447c_1
+  - traitlets=4.3.3=py37_0
+  - urllib3=1.25.8=py37_0
+  - wcwidth=0.1.8=py_0
+  - webencodings=0.5.1=py37_1
+  - wheel=0.34.2=py37_0
+  - widgetsnbextension=3.5.1=py37_0
+  - xerces-c=3.2.2=h780794e_0
+  - xlrd=1.2.0=py37_0
+  - xz=5.2.4=h14c3975_4
+  - yaml=0.2.2=h516909a_1
+  - zeromq=4.3.1=he6710b0_3
+  - zipp=2.2.0=py_0
+  - zlib=1.2.11=h7b6447c_3
+  - zstd=1.3.7=h0b5b093_0
+
diff --git a/requirements.txt b/requirements.txt
index 8254265..eccc207 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,170 +1,90 @@
-# This file may be used to create an environment using:
-# $ conda create --name <env> --file <this file>
-# platform: linux-64
-_libgcc_mutex=0.1=main
-asn1crypto=1.3.0=py37_0
-attrs=19.3.0=py_0
-autopep8=1.4.4=py_0
-backcall=0.1.0=py37_0
-beautifulsoup4=4.8.2=py37_0
-blas=1.0=mkl
-bleach=3.1.0=py37_0
-bzip2=1.0.8=h7b6447c_0
-ca-certificates=2020.1.1=0
-cairo=1.14.12=h8948797_3
-certifi=2019.11.28=py37_0
-cffi=1.14.0=py37h2e261b9_0
-chardet=3.0.4=py37_1003
-click=7.0=py37_0
-click-plugins=1.1.1=py_0
-cligj=0.5.0=py37_0
-cryptography=2.8=py37h1ba5d50_0
-curl=7.67.0=hbc83047_0
-cycler=0.10.0=py37_0
-dbus=1.13.12=h746ee38_0
-decorator=4.4.2=py_0
-defusedxml=0.6.0=py_0
-descartes=1.1.0=py_3
-entrypoints=0.3=py37_0
-expat=2.2.6=he6710b0_0
-fiona=1.8.4=py37hc38cc03_0
-fontconfig=2.13.0=h9420a91_0
-freetype=2.9.1=h8a8886c_1
-freexl=1.0.5=h14c3975_0
-gdal=2.3.3=py37hbb2a789_0
-geopandas=0.6.1=py_0
-geos=3.7.1=he6710b0_0
-giflib=5.1.4=h14c3975_1
-glib=2.63.1=h5a9c865_0
-gmp=6.1.2=h6c8ec71_1
-gst-plugins-base=1.14.0=hbbd80ab_1
-gstreamer=1.14.0=hb453b48_1
-hdf4=4.2.13=h3ca952b_2
-hdf5=1.10.4=hb1b8bf9_0
-icu=58.2=h9c2bf20_1
-idna=2.8=py37_0
-importlib_metadata=1.5.0=py37_0
-intel-openmp=2020.0=166
-ipykernel=5.1.4=py37h39e3cac_0
-ipython=7.13.0=py37h5ca1d4c_0
-ipython_genutils=0.2.0=py37_0
-ipywidgets=7.5.1=py_0
-jedi=0.16.0=py37_0
-jinja2=2.11.1=py_0
-jpeg=9b=h024ee3a_2
-json-c=0.13.1=h1bed415_0
-jsonschema=3.2.0=py37_0
-jupyter=1.0.0=py37_7
-jupyter_client=5.3.4=py37_0
-jupyter_console=6.1.0=py_0
-jupyter_contrib_core=0.3.3=py_2
-jupyter_contrib_nbextensions=0.5.1=py37_0
-jupyter_core=4.6.1=py37_0
-jupyter_highlight_selected_word=0.2.0=py37_1000
-jupyter_latex_envs=1.4.4=py37_1000
-jupyter_nbextensions_configurator=0.4.1=py37_0
-kealib=1.4.7=hd0c454d_6
-kiwisolver=1.1.0=py37he6710b0_0
-krb5=1.16.4=h173b8e3_0
-ld_impl_linux-64=2.33.1=h53a641e_7
-libboost=1.67.0=h46d08c1_4
-libcurl=7.67.0=h20c2e04_0
-libdap4=3.19.1=h6ec2957_0
-libedit=3.1.20181209=hc058e9b_0
-libffi=3.2.1=hd88cf55_4
-libgcc-ng=9.1.0=hdf63c60_0
-libgdal=2.3.3=h2e7e64b_0
-libgfortran-ng=7.3.0=hdf63c60_0
-libkml=1.3.0=h590aaf7_4
-libnetcdf=4.6.1=h11d0813_2
-libpng=1.6.37=hbc83047_0
-libpq=11.2=h20c2e04_0
-libsodium=1.0.16=h1bed415_0
-libspatialindex=1.9.3=he6710b0_0
-libspatialite=4.3.0a=hb08deb6_19
-libssh2=1.9.0=h1ba5d50_1
-libstdcxx-ng=9.1.0=hdf63c60_0
-libtiff=4.1.0=h2733197_0
-libuuid=1.0.3=h1bed415_2
-libxcb=1.13=h1bed415_1
-libxml2=2.9.9=hea5a465_1
-libxslt=1.1.33=h7d1a2b0_0
-lxml=4.5.0=py37hefd8a0e_0
-markupsafe=1.1.1=py37h7b6447c_0
-matplotlib=3.1.3=py37_0
-matplotlib-base=3.1.3=py37hef1b27d_0
-mistune=0.8.4=py37h7b6447c_0
-mkl=2020.0=166
-mkl-service=2.3.0=py37he904b0f_0
-mkl_fft=1.0.15=py37ha843d7b_0
-mkl_random=1.1.0=py37hd6b4f25_0
-munch=2.5.0=py_0
-nbconvert=5.6.1=py37_0
-nbformat=5.0.4=py_0
-ncurses=6.2=he6710b0_0
-notebook=6.0.3=py37_0
-numpy=1.18.1=py37h4f9e942_0
-numpy-base=1.18.1=py37hde5b4d6_1
-openjpeg=2.3.0=h05c96fa_1
-openssl=1.1.1d=h7b6447c_4
-pandas=1.0.1=py37h0573a6f_0
-pandoc=2.2.3.2=0
-pandocfilters=1.4.2=py37_1
-parso=0.6.1=py_0
-pcre=8.43=he6710b0_0
-pexpect=4.8.0=py37_0
-pickleshare=0.7.5=py37_0
-pip=20.0.2=py37_1
-pixman=0.38.0=h7b6447c_0
-poppler=0.65.0=h581218d_1
-poppler-data=0.4.9=0
-proj4=5.2.0=he6710b0_1
-prometheus_client=0.7.1=py_0
-prompt_toolkit=3.0.3=py_0
-ptyprocess=0.6.0=py37_0
-pycodestyle=2.5.0=py37_0
-pycparser=2.19=py37_0
-pygments=2.5.2=py_0
-pyopenssl=19.1.0=py37_0
-pyparsing=2.4.6=py_0
-pyproj=1.9.6=py37h14380d9_0
-pyqt=5.9.2=py37h05f1152_2
-pyrsistent=0.15.7=py37h7b6447c_0
-pysocks=1.7.1=py37_0
-python=3.7.6=h0371630_2
-python-dateutil=2.8.1=py_0
-python_abi=3.7=1_cp37m
-pytz=2019.3=py_0
-pyyaml=5.3=py37h8f50634_1
-pyzmq=18.1.1=py37he6710b0_0
-qt=5.9.7=h5867ecd_1
-qtconsole=4.7.1=py_0
-qtpy=1.9.0=py_0
-readline=7.0=h7b6447c_5
-requests=2.23.0=py37_0
-rtree=0.9.3=py37_0
-send2trash=1.5.0=py37_0
-setuptools=46.0.0=py37_0
-shapely=1.6.4=py37h86c5351_0
-sip=4.19.8=py37hf484d3e_0
-six=1.14.0=py37_0
-soupsieve=1.9.5=py37_0
-sqlite=3.31.1=h7b6447c_0
-terminado=0.8.3=py37_0
-testpath=0.4.4=py_0
-tk=8.6.8=hbc83047_0
-tornado=6.0.4=py37h7b6447c_1
-traitlets=4.3.3=py37_0
-urllib3=1.25.8=py37_0
-wcwidth=0.1.8=py_0
-webencodings=0.5.1=py37_1
-wheel=0.34.2=py37_0
-widgetsnbextension=3.5.1=py37_0
-xerces-c=3.2.2=h780794e_0
-xlrd=1.2.0=py37_0
-xz=5.2.4=h14c3975_4
-yaml=0.2.2=h516909a_1
-zeromq=4.3.1=he6710b0_3
-zipp=2.2.0=py_0
-zlib=1.2.11=h7b6447c_3
-zstd=1.3.7=h0b5b093_0
+asn1crypto==1.3.0
+attrs==19.3.0
+autopep8==1.4.4
+backcall==0.1.0
+beautifulsoup4==4.8.2
+bleach==3.1.0
+certifi==2019.11.28
+cffi==1.14.0
+chardet==3.0.4
+Click==7.0
+click-plugins==1.1.1
+cligj==0.5.0
+cryptography==2.8
+cycler==0.10.0
+decorator==4.4.2
+defusedxml==0.6.0
+descartes==1.1.0
+entrypoints==0.3
+Fiona==1.8.4
+GDAL==2.3.3
+geopandas==0.6.1
+idna==2.8
+importlib-metadata==1.5.0
+ipykernel==5.1.4
+ipython==7.13.0
+ipython-genutils==0.2.0
+ipywidgets==7.5.1
+jedi==0.16.0
+Jinja2==2.11.1
+jsonschema==3.2.0
+jupyter==1.0.0
+jupyter-client==5.3.4
+jupyter-console==6.1.0
+jupyter-contrib-core==0.3.3
+jupyter-contrib-nbextensions==0.5.1
+jupyter-core==4.6.1
+jupyter-highlight-selected-word==0.2.0
+jupyter-latex-envs==1.4.4
+jupyter-nbextensions-configurator==0.4.1
+kiwisolver==1.1.0
+lxml==4.5.0
+MarkupSafe==1.1.1
+matplotlib==3.1.3
+mistune==0.8.4
+mkl-fft==1.0.15
+mkl-random==1.1.0
+mkl-service==2.3.0
+munch==2.5.0
+nbconvert==5.6.1
+nbformat==5.0.4
+notebook==6.0.3
+numpy==1.18.1
+pandas==1.0.1
+pandocfilters==1.4.2
+parso==0.6.1
+pexpect==4.8.0
+pickleshare==0.7.5
+prometheus-client==0.7.1
+prompt-toolkit==3.0.3
+ptyprocess==0.6.0
+pycodestyle==2.5.0
+pycparser==2.19
+Pygments==2.5.2
+pyOpenSSL==19.1.0
+pyparsing==2.4.6
+pyproj==1.9.6
+pyrsistent==0.15.7
+PySocks==1.7.1
+python-dateutil==2.8.1
+pytz==2019.3
+PyYAML==5.3
+pyzmq==18.1.1
+qtconsole==4.7.1
+QtPy==1.9.0
+requests==2.23.0
+Rtree==0.9.3
+Send2Trash==1.5.0
+Shapely==1.6.4.post1
+six==1.14.0
+soupsieve==1.9.5
+terminado==0.8.3
+testpath==0.4.4
+tornado==6.0.4
+traitlets==4.3.3
+urllib3==1.25.8
+wcwidth==0.1.8
+webencodings==0.5.1
+widgetsnbextension==3.5.1
+xlrd==1.2.0
+zipp==2.2.0