The term respiratory tract infection is identified in base64 scheme by the sequence cmVzcGlyYXRvcnkgdHJhY3QgaW5mZWN0aW9u, while the MD5 signature is equal to 68aea9da2225191f75d06453cd6677a9. The ASCII encoding of respiratory tract infection in hexadecimal notation is 72657370697261746f727920747261637420696e66656374696f6e.