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| 100 | 1 | _aLapid, Nancy | |
| 245 |
_aVirus variants found to be deadlier, more contagious; some may thwart vaccines / _cby Nancy Lapid |
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| 520 | _uhttps://news.abs-cbn.com/overseas/03/18/21/virus-variants-found-to-be-deadlier-more-contagious-some-may-thwart-vaccines | ||
| 653 | _aVirus variants | ||
| 653 | _athwart vaccines | ||
| 653 | _adeadlier | ||
| 786 |
_aABS-CBN News Online _bMarch 18, 2021 |
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| 856 | 4 | _uhttp://elibrary.doh.gov.ph/cgi-bin/koha/opac-retrieve-file.pl?id=dee253372509fe62add75e77483d0476 | |
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