Question

how it is useful or helpful covid-19 vaccination​

Answer 1

Explanation:

All the global agencies have set the benchmark that only those vaccine candidates which show and efficacy of at least 50-60% will be considered. Most of the vaccines have shown as efficacy of 70-90% within the short period of two or three months of observation.

please mark the brainliest.

Answer 2

Tʜᴇ ᴄᴏᴠɪᴅ-19 ᴠᴀᴄᴄɪɴᴇꜱ ᴘʀᴏᴅᴜᴄᴇ ᴘʀᴏᴛᴇᴄᴛɪᴏɴ ᴀɢᴀɪɴꜱᴛ ᴛʜᴇ ᴅɪꜱᴇᴀꜱᴇ, ᴀꜱ ᴀ ʀᴇꜱᴜʟᴛ ᴏꜰ ᴅᴇᴠᴇʟᴏᴘɪɴɢ ᴀɴ ɪᴍᴍᴜɴᴇ ʀᴇꜱᴘᴏɴꜱᴇ ᴛᴏ ᴛʜᴇ ꜱᴀʀꜱ-ᴄᴏᴠ-2 ᴠɪʀᴜꜱ. Dᴇᴠᴇʟᴏᴘɪɴɢ ɪᴍᴍᴜɴɪᴛʏ ᴛʜʀᴏᴜɢʜ ᴠᴀᴄᴄɪɴᴀᴛɪᴏɴ ᴍᴇᴀɴꜱ ᴛʜᴇʀᴇ ɪꜱ ᴀ ʀᴇᴅᴜᴄᴇᴅ ʀɪꜱᴋ ᴏꜰ ᴅᴇᴠᴇʟᴏᴘɪɴɢ ᴛʜᴇ ɪʟʟɴᴇꜱꜱ ᴀɴᴅ ɪᴛꜱ ᴄᴏɴꜱᴇQᴜᴇɴᴄᴇꜱ. Tʜɪꜱ ɪᴍᴍᴜɴɪᴛʏ ʜᴇʟᴘꜱ ʏᴏᴜ ꜰɪɢʜᴛ ᴛʜᴇ ᴠɪʀᴜꜱ ɪꜰ ᴇxᴘᴏꜱᴇᴅ.

Hᴏᴘᴇ ɪᴛ ʜᴇʟᴘꜱ ʏᴏᴜ ᴀɴᴅ ᴘʟᴇᴀꜱᴇ ᴍᴀᴋᴇ ᴛʜɪꜱ ᴛʜᴇ Bʀᴀɪɴʟɪᴇꜱᴛ ᴏɴᴇ