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Abstract digital illustration of bacteriophages against a purple background. Futuristic image of an immune system protecting from infectious diseases with a glowing low polygonal shield, coronavirus and bacteria cells on dark blue background. A cartoon-like graphic showing multicolored microbes and viruses on a dark blue background. A searchlight tracks over the microbes, revealing a section of colorful DNA inside a bacterium. Hand holding a cigarette near carpet. An artistic rendering of lipid nanoparticles showing multiple layers that take on different molecular arrangements, giving the particle varying properties. Eva Nogales, a person with medium-length white hair wearing glasses and a dark jacket over a white collared top, photographed outdoors with trees in the background. A digital illustration showing red virus particles each with a geometrically shaped capsule, stalk, and leg-like appendages attached to the surface of a green bacterium. A digital illustration showing red virus particles each with a geometrically shaped capsule, stalk, and leg-like appendages attached to the surface of a green bacterium. A dark blue, green, and white digital illustration of a set of human lungs on a screen with small coronavirus particles and graphs and medical symbols A digital illustration of an hourglass filled with pieces of virus capsules and DNA strands. The pieces at the top of the hourglass are purple, and they are flowing downward into viral pieces that are orange. Upward view of city buildings against a blue sky with white clouds. Digital traffic sign reading Excessive Heat High Fire Danger Use Caution.