Adds symptom info screens to each symptom

components/header/default.js

@@ -0,0 +1,16 @@
+import React from 'react'
+import {
+  View,
+  Text} from 'react-native'
+import styles from '../../styles'
+
+export default function DefaultHeader(props) {
+  return (
+    <View style={styles.header}>
+      <View style={styles.accentCircle} />
+      <Text style={styles.headerText}>
+        {props.title}
+      </Text>
+    </View >
+  )
+}