3 years ago

Why is each year's vaccine different?

Chemistry

2 answers:

Degger [83]3 years ago

5 0

Because the birds that fly overseas carry different flu viruses every year.

Gemiola [76]3 years ago

5 0

Answer:

Flu vaccinations are needed each year to ensure you have continuous protection. Though you may have received a flu vaccine last year, your body's immune system from previous vaccinations gradually decreases over time. By the time flu season comes around, your body's immunity to it is virtuality non-existent.

Explanation:

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cupoosta [38]

Answer:

The answer is barium phosphate

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3 years ago

Which pair of elements would most likely combine to form a salt? I and F Cs and I Na and C N and F

Savatey [412]

Answer:

Cs and I

Explanation:

Salts are formed when an ionic bond is formed between two elements in the compound. Let us recall that the kind of bond formed between any two elements depends on the magnitude of electronegativity difference between the two elements.

Among the options listed, the highest degree of electronegativity difference occurs for the bond between Cs and I. This implies that this bond is ionic and the combination of the two elements will lead to salt formation.

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Minchanka [31]

I’m pretty the answer would be continental slope. :)
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3 years ago

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which occupies a larger volume, 600 g of water (with a density of 0.995 g/cm3 ) or 600 g of lead (with a density of 11.35 g/cm3

Montano1993 [528]

Water will occupy larger volume

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