Since my sister is two years younger than me, it must have been when I was two years old. I remember seeing a baby in an incubator which I assume to be my sister.
The memroy is blurry, and I only remember two things that were particularly memorable. I was hold tightly by my father and my mother was standing next to us. And, the incuvator my sister was laid in was placed horizontally along the wall.
I certainly don't consider me at this time as myself now, because I don't even remember what I was like. But this scene is consistent with what my parents describe, and this is the earliest memory I can think of. I wonder, however, whether I've fabricated a part of it to match it with my parent's description.
Like my memory, yours is most likely memorable due to the emotional circumstances. Your memory relates in a way to mine, by how a traumatic occurrence to a close family member has stayed with you all these years. Not only were you witnessing your sister's struggle to live with assistance from the incubator, but you were also surrounded by the worried emotions of your parents. The impact of emotions on young children plays an important part to the development and self-awareness of adults.
Like your memory, mine is definitely blurry and was probably solidified in my mind because it is so emotional. Also it seems difficult for anyone to vividly remember something from such a young age without being influenced by an adult's stories about that same occurance.