Not an antenna, the wire in the mask is limited to a wire that helps the surgical mask be worn more tightly on the face, especially in the nose. Without the wire, the mask is easily loosened by the breath of the user.

(English version of  [SALAH] “Antena 5G di dalam masker Anda”https://bit.ly/39EqssC)

More information in the EXPLANATION and REFERENCES section
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Category: Misleading Content
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The Boyce Makedah Account ( fb.com/makedahboyce ) uploaded a video with the narration as follows:

“5G antenna inside of your masks”

In the video that he uploaded, showing someone who was stuck a wire and mask. “Yes, indeed. The antenna killer, 5G antenna killer, that’s inside the masks that they are telling everybody to wear” said the person in the video.

Source: https://archive.md/YLeE7 (Archive)

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EXPLANATION

Based on the search results, the claim that there is a 5G antenna in the mask is a misleading claim.

In fact, the wire in the mask is not an antenna, the wire in the mask is limited to the wire that helps the surgical mask be worn more tightly on the face, especially in the nose. Without the wire, the mask is easily loosened by the breath of the user.

According to the World Health Organization (WHO) and a number of health experts, the only function of the metal strip is to increase its protective effect on medical masks.

In the WHO video explaining how to wear a medical mask, Dr. April Baller, an infection control expert from the organization, said, “Find the top part of the mask, that part is usually marked by a metal strip.” Baller instructs users to wear masks and then adds, “Pinch the metal strip to match the shape of your nose.”

In a video from the Bloomberg QuickTake News program, Seto Wing Hong, one of the directors at the WHO Collaborative Center for Epidemiology and Communicable Disease Control, showed the top of the mask and said, “Can you see this? This strong, small, thick metal strip? This is to show that you have to put it on top. Why? Because when you wear a mask, you need to press it until it pinches your nose, then you pull the mask down. “

Metal strips on surgical masks allow the mask to “be formed in accordance with the user’s nose to make it more comfortable to wear,” according to a spokesman for 3M, a manufacturer of personal protective equipment (PPE).

Regarding the health risks of 5G, WHO said in February through its website that “after doing a lot of research, there are no adverse health effects associated with exposure to wireless technology.

REFERENCES
https://www.liputan6.com/global/read/4316994/viral-kawat-dalam-masker-medis-disebut-antena-5g-pembunuh-ini-faktanya
https://www.jawapos.com/hoax-atau-bukan/28/07/2020/strip-logam-di-masker-medis-bukan-antena-5g/
https://www.reuters.com/article/uk-factcheck-metal-strip-medical-masks-5/fact-check-metal-strip-in-medical-masks-is-not-a-5g-antenna-idUSKBN24A2O1