What wave are prouced by sars and galaxies?

SARS (Severe Acute Respiratory Syndrome) is associated with the spread of viral infection and does not produce waves in the physical sense. However, in the context of astrophysics, galaxies produce gravitational waves when massive celestial bodies like neutron stars or black holes collide or merge. These gravitational waves are ripples in spacetime that can be detected by observatories like LIGO. Thus, while SARS relates to biological waves of infection, galaxies are linked to gravitational waves from cosmic events.