should i be worried about the whatsapp encryption backdoor? /

What is the sign protocol,why is there a hole in its encryption, what does that mean for my privacy and are there any alternatives?Exclusive: WhatsApp backdoor allows snooping on encrypted messages[br]A backdoor has been found within Facebook’s secure messaging service WhatsApp, or which would allow the company and third-parties such as government agencies to intercept and read supposedly encrypted and private messages.
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Source: theguardian.com