diff --git a/include/corona.h b/include/corona.h
new file mode 100644
index 00000000..fcbf556d
--- /dev/null
+++ b/include/corona.h
@@ -0,0 +1,16 @@
+#ifndef _CORONA_h
+#define _CORONA_H
+
+// inspired by https://github.com/kmetz/BLEExposureNotificationBeeper
+// (c) by Kaspar Metz
+// modified for use in the Paxcounter by AQ
+
+#include "globals.h"
+#include <map>
+
+bool cwa_init(void);
+bool cwa_mac_add(uint8_t *);
+void cwa_clear(void);
+uint16_t cwa_report(void);
+
+#endif