It depends on how you use it.
If it is a name it should be capitalized.
If it is another part of the speech it shouldn't be capitalized
no
You do not capitalize chickenpox in a sentence. The exception is if the word is the first in the sentence.
No, you do not capitalize "first birthday" in a sentence.
You only capitalize 'deceased' if it is at the start of a sentence.
No, there is no need to capitalize 'nun' or 'nuns' in a sentence.
No, you do not capitalize marine biologist in a sentence. (Unless marine is in the beginning of the sentence)
It depends on where you put it in a sentence. Of coarse in the beginning of a sentence you capitalize space but by it's self no you don't capitalize.
Yes, you always capitalize a day of the week.
You should not capitalize a sentence fragment following a colon.
No you do not capitalize artist in a sentence
No, you should not capitalize "anxiety" in a sentence unless it is at the beginning of a sentence or part of a title.
no or at least not any more than i capitalize the word sentence in a paragraph