The term hypersensitivity reaction is identified in base64 scheme by the sequence aHlwZXJzZW5zaXRpdml0eSByZWFjdGlvbg==, while the MD5 signature is equal to a546847f2ea399a77db885773c84317c. The ASCII encoding of hypersensitivity reaction in hexadecimal notation is 687970657273656e7369746976697479207265616374696f6e.