Whether these beneficial effects would also apply to humans is still uncertain.

The same effect also applies to cultural and racial differences.

But "it's not entirely clear that the effect applies in individual cases," Galvin says.

Does the same effect apply to all of us?

The effect also applies on the small scale to snow-covered surfaces.

This effect only applies to west to east storms.

The most blatant example surfaced when the reverse effect applied.

And, significantly, the same effect does not apply to children who already have pet allergies.

However, those effects do not apply to skin cancer cells.

This effect applies worldwide and not only to the Middle East.