Theory:Alejandro's ability

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The following fan theories are about Alejandro's ability.

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Theories

Theory	Citations	Notes
Alejandro's ability is to reverse the effects of other abilities as well as protect Alejandro himself from those other abilities.	Alejandro manages to protect himself from the deadly side effects of Maya's ability as well as revive Nidia. (Lizards)	• So far, Maya is the only known evolved human that Alejandro has been seen with, so it remains to be seen what will happen when he encounters another ability. • The curandera who said Maya's disease was "black" was possibly another evolved human, but Alejandro didn't appear to concentrate his power in her presence.
Alejandro's has the power to absorb diseases into himself and eradicate them.	Alejandro makes the black tears disappear from Maya and Nidia. (Lizards)	+ When the blackness in Maya's eyes disappears, Alejandro's eyes turn black, and then clear. • This might only work with Maya's ability. • It is currently unknown if Maya's ability is a disease rather than a toxin or some other effect.
Alejandro can switch powers with Maya and vice versa. The disease must be transferred to the other twin in order to reverse effects.	Alejandro makes the black tears disappear from Maya and they enter him. (Lizards)	+ Something is transferred when Maya and Alejandro are holding each other's hands. + The blackness disappears from Maya and reappears in Alejandro's eyes. - Alejandro is never shown using Maya's power, thus it is never shown being transferred back to her.
With frequent use, this power will render Alejandro incapacitated, and might possibly kill him.	None.	+ Alejandro is visibly exhausted after "absorbing" the effects of Maya's power into him. (Lizards)
Alejandro's ability is limited to curing Maya's ability	None	+ Mohinder states that when one sibling has a disease, the antibodies of another sibling can be used to cure it. This would be consistent with that theory. - This does not necessarily mean that Alejandro's ability can only be used to cure the effects of Maya's ability. Mohinder uses his blood to cure Molly Walker and the Haitian.
Alejandro's ability will cure the new strain of the Shanti virus.	None	+ There are hints towards what seems to be a curse turning out to be a gift. - This does not necessarily mean that Alejandro's ability can only be used to cure the effects of Maya's ability. Mohinder uses his blood to cure Molly Walker and the Haitian.
Evolved twins such as Alejandro and Maya have a split version of one ability. If only one of them was born they could have the power to cause and cure the black tear disease. Being twins might have split the power into 2 parts.	None	- Alejandro and Maya are fraternal twins, and as such, do not share the same DNA. So, even if "splitting" of powers was possible between identical twins, it would not apply to them.
Alejandro's ability is simply healing, like Linderman.	None	+ Many characters this season have shared powers with a previous character (West, Maury, Adam). - Linderman's eyes did not seem affected the same way as Alejandro's. • It's possible that healing absorbs diseases partially, and only Maya's ability causes blackness of the eyes. - Alejandro hasn't been shown to heal anything other than those affected by Maya's ability (through healing Maya). • Alejandro may not have full control of his abilities. Linderman had probably over 30 years more experience than Alejandro.
Alejandro's ability is to absorb foreign contaminants (like poisons and germs) into his body and destroy them with a powerful immune system.	None	+ Plotwise, this would be significant because it would allow him to fight the upcoming Shanti virus epidemic. + When he uses his ability, the blackness in Maya's tears disappears, leaving clear tears behind. The black substance must go somewhere. + Alejandro's eyes blacken when he counteracts Maya's ability. This may indicate that the black substance enters his body.
Rather than only absorbing, Alejandro ability "attracts" diseases, at a short distance, this can nulify Maya power, but at a "medium" distance this makes Maya's power stronger and affecting everything between and near the two. It would be safer if the twins are completely separated.	None	+ His ability "heals" Maya and nearby victims as well, showing that it works at distance (the range is unknown). - Maya can still activate her power when near him. + She could just be using her power at a greater strength due concentration. + Maya spend a time trying to become a nun, she was there long enough to be found by her brother, but not enough to her ability to manifest again and cause everyone to die. + Maya power almost imediatly manifest when Nidia is trying to help them to cross the border, but not when they are separated by the guards in Lizards her power only manifests after she arrives in jail.